34,000-Gallon Chemical Tank Crisis Eases As Evacuation Zones Lifted, Roads Reopened

OCFA also reports the safety zone around the involved tank has now been reduced to 150 feet due to continued stabilization of conditions.

OCFA confirms all roads that were closed as a result of the Garden Grove hazardous materials incident are now open.

Officials state no current leak or threat has been found, and responders are lifting all restrictions, though Western Avenue will continue to remain closed.

An update from officials has confirmed that the evacuation orders have been lifted for all residents.

Evacuation orders still remain in effect, per OCFA.

Efforts will continue throughout the day Tuesday to maintain this temperature, while monitoring adjacent tanks for any changes.

Fortunately, the temperature of the affected tank is now holding steady at 92 degrees.

According to an update from the Orange County Fire Authority on X (formerly Twitter), crews monitored the affected tank and adjacent tanks overnight.

No civilians or firefighters have been injured.

Officials noted that around 16,000 people remain under evacuation orders, stressing that the incident is "not over yet." Crews still need to mitigate fire and spill concern, in addition to a very small explosion concern.

A new evacuation map has been shared, effective as of 6 p.m. on Monday, May 25. The red shaded area represents the newest evacuation zone, while the red outline represents the previous evacuation zone. The new borders consist of Orangewood Ave to the north, Dale St to the east, Knott St to the west, and Garden Grove Blvd to the south.

Officials announced Monday night that evacuation orders have been reduced.

More than 785 state and local emergency personnel continue to assist at the scene, including firefighters, hazmat experts, public health officials, and environmental scientists "working around the clock," per a statement from Gov. Gavin Newsom's office.

President Trump approved a Presidential Emergency Declaration for Orange County on Monday, allowing FEMA to deploy personnel, equipment, and specialized resources to support the ongoing response.

However, "there is still no chemical leak, as verified by continuous atmospheric monitoring," OCFA officials said.

Officials say that while the catastrophic risk of a massive explosion has been eliminated, there's still an ongoing threat to public safety.

UPDATE: There is no more risk of a catastrophic vapor explosion from the tank, authorities said on Monday morning.

Although a BLEVE (Boiling Liquid Expanding Vapor Explosion) is “off the table,” the evacuation zone remains in place as operations continue, authorities said. "significant public health and environmental risks remain," officials said, as a smaller explosion or leak could occur. Monday morning’s development was still called “incredibly positive news.”

During an overnight operation on Sunday, crews confirmed a pressure-relieving crack on the tank, and found that the temperature inside has stabilized down to 93 degrees.

Current instrument readings indicate no current active leak.

A tweet sent by the OCFA indicated only one crack has been identified on the tank.

Responders are planning operations during the evening hours to verify pressure readings.

Officials believe the internal tank temperature has exceeded 100 degrees and can no longer accurately measure the current temperature.

An update from officials indicates the temperature shown on the tank gauge has risen to 100 degrees, the highest possible reading on the gauge.

The OCDA said in a later update that any areas outside of the evacuation zone "are currently considered completely safe and day-to-day activities can continue as normal."

Evacuation orders remain in place. There are still tens of thousands of people evacuated—reports as of Sunday morning say it's 50,000 residents.

Authorities are continuing to develop response plans based on the information gained from the overnight inspection.

The inspection discovered a crack that may be relieving pressure and assisting in stabilizing the chemical.

In an update from the Orange County Fire Authority, responders entered the site and made a close inspection of the failing tank.

Additional state resources are continuing to support efforts at the scene.

Governor Newsom has declared a state of emergency due to the ongoing efforts in Garden Grove.

Firefighters are spraying down the tanks to maintain proper temperature.

Citizen user video shows liquid spraying up from an unknown source inside the facility grounds.

Additionally, the OCFA has begun triaging solutions in case of a rupture without an explosion.

OCFA is continuing to work with a team of chemical experts on a plan.

The finding was discovered after an offensive posture was taken overnight, which allowed responders to read a gauge of the internal temperature of the chemical.

An update from the Unified Incident Commander Craig Covey indicated progress throughout the evening had reversed after temperature readings had increased at an average of 1 degree per hour.

Authorities have assessed several possible options once an ideal temperature is reached to prevent a rupture or explosion.

In an evening update, OCFA has advised that the temperature of the chemical inside the tank has been lowered as responders continue to work to reach a level allowing possible action.

An update from OCFA has asked the public to avoid calling emergency services with unsolicited ideas.

During the press conference, an OCFA official indicated that previous comments of authorities' inability to mitigate the tank were ' not acceptable', and several authorities from across the country are working with the OCFA for a safe resolution.

An update from authorities at a presser indicated responders continue to maintain a water curtain on the tank for temperature control.

Officials have opened evacuation centers at the Garden Grove Sports and Recreation Center and the Cypress Recreation and Community Center.

Authorities have estimated around 40,000 people have been evacuated.

The Garden Grove Unified School District remains closed.

The evacuation of nearby residents continues after a brief reprieve last night.

ABC 7 reported at press conference today, OCFA Division Chief stated: "There are literally two options left remaining: one, the tank fails and spills a total of about six-to-seven thousand gallons of very bad chemicals into the parking lot in that area -- or two, the tank goes into a thermal runaway and blows up, affecting the tanks around them that have chemicals in them as well,"

Residents are urged to follow evacuation orders and listen to all directions from first responders.

OFCA also confirms there is no active gas leak.

Evacuation orders have expanded, per OCFA personnel.

In a press conference this afternoon, first responders and HazMat units continue to operate at the scene. The tank is "actively in crisis", meaning a potential chemical spill or the possibility for a thermal runaway.

OCFA's Public Information Hotline phone number is [714-628-7085](tel:714-628-7085). Anyone seeking information or resources is asked to call this number for assistance.

The County of Orange activated and staffed the Emergency Operations Center (EOC) with County agency representatives, according to OCFA's X account.

While yesterday's cooling operation was successful, an inoperable valve on the tank has created additional operational challenges, preventing complete mitigation, according to the OCFA.

A temporary shelter has been established at Stanton City Hall at 7800 Katella Avenue.

The Orange County Fire Authority (OCFA) has re-issued evacuation orders for areas north of Garden Grove Boulevard, east of Springdale Avenue, west of Dale Street and south of Orangewood Avenue, according to CBS News. The OCFA said deputies from the Orange County Sheriff's Department will be going door to door assisting residents. The duration of the evacuation is unknown.

Evacuation orders have been lifted. However, The following street closures remain in place: Western Ave from Garden Grove Blvd to Chapman Ave, and Lampson Ave from Santa Rosalia Ave to Western Ave.

There has still been no word on injuries thus far.

CORRECTION: This incident was first responded at 3:22 p.m. on Thursday. A previous version of this incident incorrectly stated the leak occurred on Wednesday.

The address reported for this incident has changed to 12100 Western Ave.

Evacuation orders remain in place for the area north of Garden Grove Boulevard, east of Monarch Street, south of Orangewood Avenue, and west of Beach Boulevard. An evacuation site has been established at the Rancho Alamitos High School gym at 11351 Dale Street in Garden Grove.

The tank's temperature had risen, activating a relief valve designed to safely vent the pressure. An overhead sprinkler system was also activated to cool the tank. Vapor conditions have since improved and the liquid temperature is decreasing. Firefighters are using large unmanned hoses to assist with cooling while industrial cleanup contractors prepare for the next phase of operations.

At approximately 3:22 p.m. on Wednesday, firefighters responded to a facility in the 12100 block of Western Avenue after a 34,000-gallon tank containing methyl methacrylate—an industrial chemical used in plastics and manufacturing—released vapors.

Orange County hazmat teams are at the scene of a chemical leak from a large industrial tank at an aerospace manufacturing facility in Garden Grove, prompting evacuations of the surrounding area.

Several blocks were evacuated, per the Los Angeles Times.

The surrounding area has been evacuated as a precaution. No injuries have been reported and the cause of the leak is under investigation.

Crews responded to the facility on Western Avenue shortly before 3:40 p.m. on Wednesday after a tank containing methyl methacrylate—a flammable plastic epoxy that generates its own heat—began leaking. Firefighters are spraying the tank with water to keep temperatures down, per CBS LA. The chemical's temperature has not risen.

Orange County firefighters are responding to a hazardous materials incident at an aerospace components facility in Garden Grove after an industrial tank began leaking a flammable chemical.

Incident reported at 12000 Western Ave.

OCFA also reports the safety zone around the involved tank has now been reduced to 150 feet due to continued stabilization of conditions.

OCFA confirms all roads that were closed as a result of the Garden Grove hazardous materials incident are now open.

Officials state no current leak or threat has been found, and responders are lifting all restrictions, though Western Avenue will continue to remain closed.

An update from officials has confirmed that the evacuation orders have been lifted for all residents.

Evacuation orders still remain in effect, per OCFA.

Efforts will continue throughout the day Tuesday to maintain this temperature, while monitoring adjacent tanks for any changes.

Fortunately, the temperature of the affected tank is now holding steady at 92 degrees.

According to an update from the Orange County Fire Authority on X (formerly Twitter), crews monitored the affected tank and adjacent tanks overnight.

No civilians or firefighters have been injured.

Officials noted that around 16,000 people remain under evacuation orders, stressing that the incident is "not over yet." Crews still need to mitigate fire and spill concern, in addition to a very small explosion concern.

A new evacuation map has been shared, effective as of 6 p.m. on Monday, May 25. The red shaded area represents the newest evacuation zone, while the red outline represents the previous evacuation zone. The new borders consist of Orangewood Ave to the north, Dale St to the east, Knott St to the west, and Garden Grove Blvd to the south.

Officials announced Monday night that evacuation orders have been reduced.

More than 785 state and local emergency personnel continue to assist at the scene, including firefighters, hazmat experts, public health officials, and environmental scientists "working around the clock," per a statement from Gov. Gavin Newsom's office.

President Trump approved a Presidential Emergency Declaration for Orange County on Monday, allowing FEMA to deploy personnel, equipment, and specialized resources to support the ongoing response.

However, "there is still no chemical leak, as verified by continuous atmospheric monitoring," OCFA officials said.

Officials say that while the catastrophic risk of a massive explosion has been eliminated, there's still an ongoing threat to public safety.

UPDATE: There is no more risk of a catastrophic vapor explosion from the tank, authorities said on Monday morning.

Although a BLEVE (Boiling Liquid Expanding Vapor Explosion) is “off the table,” the evacuation zone remains in place as operations continue, authorities said. "significant public health and environmental risks remain," officials said, as a smaller explosion or leak could occur. Monday morning’s development was still called “incredibly positive news.”

During an overnight operation on Sunday, crews confirmed a pressure-relieving crack on the tank, and found that the temperature inside has stabilized down to 93 degrees.

Current instrument readings indicate no current active leak.

A tweet sent by the OCFA indicated only one crack has been identified on the tank.

Responders are planning operations during the evening hours to verify pressure readings.

Officials believe the internal tank temperature has exceeded 100 degrees and can no longer accurately measure the current temperature.

An update from officials indicates the temperature shown on the tank gauge has risen to 100 degrees, the highest possible reading on the gauge.

The OCDA said in a later update that any areas outside of the evacuation zone "are currently considered completely safe and day-to-day activities can continue as normal."

Evacuation orders remain in place. There are still tens of thousands of people evacuated—reports as of Sunday morning say it's 50,000 residents.

Authorities are continuing to develop response plans based on the information gained from the overnight inspection.

The inspection discovered a crack that may be relieving pressure and assisting in stabilizing the chemical.

In an update from the Orange County Fire Authority, responders entered the site and made a close inspection of the failing tank.

Additional state resources are continuing to support efforts at the scene.

Governor Newsom has declared a state of emergency due to the ongoing efforts in Garden Grove.

Firefighters are spraying down the tanks to maintain proper temperature.

Citizen user video shows liquid spraying up from an unknown source inside the facility grounds.

Additionally, the OCFA has begun triaging solutions in case of a rupture without an explosion.

OCFA is continuing to work with a team of chemical experts on a plan.

The finding was discovered after an offensive posture was taken overnight, which allowed responders to read a gauge of the internal temperature of the chemical.

An update from the Unified Incident Commander Craig Covey indicated progress throughout the evening had reversed after temperature readings had increased at an average of 1 degree per hour.

Authorities have assessed several possible options once an ideal temperature is reached to prevent a rupture or explosion.

In an evening update, OCFA has advised that the temperature of the chemical inside the tank has been lowered as responders continue to work to reach a level allowing possible action.

An update from OCFA has asked the public to avoid calling emergency services with unsolicited ideas.

During the press conference, an OCFA official indicated that previous comments of authorities' inability to mitigate the tank were ' not acceptable', and several authorities from across the country are working with the OCFA for a safe resolution.

An update from authorities at a presser indicated responders continue to maintain a water curtain on the tank for temperature control.

Officials have opened evacuation centers at the Garden Grove Sports and Recreation Center and the Cypress Recreation and Community Center.

Authorities have estimated around 40,000 people have been evacuated.

The Garden Grove Unified School District remains closed.

The evacuation of nearby residents continues after a brief reprieve last night.

ABC 7 reported at press conference today, OCFA Division Chief stated: "There are literally two options left remaining: one, the tank fails and spills a total of about six-to-seven thousand gallons of very bad chemicals into the parking lot in that area -- or two, the tank goes into a thermal runaway and blows up, affecting the tanks around them that have chemicals in them as well,"

Residents are urged to follow evacuation orders and listen to all directions from first responders.

OFCA also confirms there is no active gas leak.

Evacuation orders have expanded, per OCFA personnel.

In a press conference this afternoon, first responders and HazMat units continue to operate at the scene. The tank is "actively in crisis", meaning a potential chemical spill or the possibility for a thermal runaway.

OCFA's Public Information Hotline phone number is [714-628-7085](tel:714-628-7085). Anyone seeking information or resources is asked to call this number for assistance.

The County of Orange activated and staffed the Emergency Operations Center (EOC) with County agency representatives, according to OCFA's X account.

While yesterday's cooling operation was successful, an inoperable valve on the tank has created additional operational challenges, preventing complete mitigation, according to the OCFA.

A temporary shelter has been established at Stanton City Hall at 7800 Katella Avenue.

The Orange County Fire Authority (OCFA) has re-issued evacuation orders for areas north of Garden Grove Boulevard, east of Springdale Avenue, west of Dale Street and south of Orangewood Avenue, according to CBS News. The OCFA said deputies from the Orange County Sheriff's Department will be going door to door assisting residents. The duration of the evacuation is unknown.

Evacuation orders have been lifted. However, The following street closures remain in place: Western Ave from Garden Grove Blvd to Chapman Ave, and Lampson Ave from Santa Rosalia Ave to Western Ave.

There has still been no word on injuries thus far.

CORRECTION: This incident was first responded at 3:22 p.m. on Thursday. A previous version of this incident incorrectly stated the leak occurred on Wednesday.

The address reported for this incident has changed to 12100 Western Ave.

Evacuation orders remain in place for the area north of Garden Grove Boulevard, east of Monarch Street, south of Orangewood Avenue, and west of Beach Boulevard. An evacuation site has been established at the Rancho Alamitos High School gym at 11351 Dale Street in Garden Grove.

The tank's temperature had risen, activating a relief valve designed to safely vent the pressure. An overhead sprinkler system was also activated to cool the tank. Vapor conditions have since improved and the liquid temperature is decreasing. Firefighters are using large unmanned hoses to assist with cooling while industrial cleanup contractors prepare for the next phase of operations.

At approximately 3:22 p.m. on Wednesday, firefighters responded to a facility in the 12100 block of Western Avenue after a 34,000-gallon tank containing methyl methacrylate—an industrial chemical used in plastics and manufacturing—released vapors.

Orange County hazmat teams are at the scene of a chemical leak from a large industrial tank at an aerospace manufacturing facility in Garden Grove, prompting evacuations of the surrounding area.

Several blocks were evacuated, per the Los Angeles Times.

The surrounding area has been evacuated as a precaution. No injuries have been reported and the cause of the leak is under investigation.

Crews responded to the facility on Western Avenue shortly before 3:40 p.m. on Wednesday after a tank containing methyl methacrylate—a flammable plastic epoxy that generates its own heat—began leaking. Firefighters are spraying the tank with water to keep temperatures down, per CBS LA. The chemical's temperature has not risen.

Orange County firefighters are responding to a hazardous materials incident at an aerospace components facility in Garden Grove after an industrial tank began leaking a flammable chemical.

Incident reported at 12000 Western Ave.

OCFA also reports the safety zone around the involved tank has now been reduced to 150 feet due to continued stabilization of conditions.

OCFA confirms all roads that were closed as a result of the Garden Grove hazardous materials incident are now open.

Officials state no current leak or threat has been found, and responders are lifting all restrictions, though Western Avenue will continue to remain closed.

An update from officials has confirmed that the evacuation orders have been lifted for all residents.

Evacuation orders still remain in effect, per OCFA.

Efforts will continue throughout the day Tuesday to maintain this temperature, while monitoring adjacent tanks for any changes.

Fortunately, the temperature of the affected tank is now holding steady at 92 degrees.

According to an update from the Orange County Fire Authority on X (formerly Twitter), crews monitored the affected tank and adjacent tanks overnight.

No civilians or firefighters have been injured.

Officials noted that around 16,000 people remain under evacuation orders, stressing that the incident is "not over yet." Crews still need to mitigate fire and spill concern, in addition to a very small explosion concern.

A new evacuation map has been shared, effective as of 6 p.m. on Monday, May 25. The red shaded area represents the newest evacuation zone, while the red outline represents the previous evacuation zone. The new borders consist of Orangewood Ave to the north, Dale St to the east, Knott St to the west, and Garden Grove Blvd to the south.

Officials announced Monday night that evacuation orders have been reduced.

More than 785 state and local emergency personnel continue to assist at the scene, including firefighters, hazmat experts, public health officials, and environmental scientists "working around the clock," per a statement from Gov. Gavin Newsom's office.

President Trump approved a Presidential Emergency Declaration for Orange County on Monday, allowing FEMA to deploy personnel, equipment, and specialized resources to support the ongoing response.

However, "there is still no chemical leak, as verified by continuous atmospheric monitoring," OCFA officials said.

Officials say that while the catastrophic risk of a massive explosion has been eliminated, there's still an ongoing threat to public safety.

UPDATE: There is no more risk of a catastrophic vapor explosion from the tank, authorities said on Monday morning.

Although a BLEVE (Boiling Liquid Expanding Vapor Explosion) is “off the table,” the evacuation zone remains in place as operations continue, authorities said. "significant public health and environmental risks remain," officials said, as a smaller explosion or leak could occur. Monday morning’s development was still called “incredibly positive news.”

During an overnight operation on Sunday, crews confirmed a pressure-relieving crack on the tank, and found that the temperature inside has stabilized down to 93 degrees.

Current instrument readings indicate no current active leak.

A tweet sent by the OCFA indicated only one crack has been identified on the tank.

Responders are planning operations during the evening hours to verify pressure readings.

Officials believe the internal tank temperature has exceeded 100 degrees and can no longer accurately measure the current temperature.

An update from officials indicates the temperature shown on the tank gauge has risen to 100 degrees, the highest possible reading on the gauge.

The OCDA said in a later update that any areas outside of the evacuation zone "are currently considered completely safe and day-to-day activities can continue as normal."

Evacuation orders remain in place. There are still tens of thousands of people evacuated—reports as of Sunday morning say it's 50,000 residents.

Authorities are continuing to develop response plans based on the information gained from the overnight inspection.

The inspection discovered a crack that may be relieving pressure and assisting in stabilizing the chemical.

In an update from the Orange County Fire Authority, responders entered the site and made a close inspection of the failing tank.

Additional state resources are continuing to support efforts at the scene.

Governor Newsom has declared a state of emergency due to the ongoing efforts in Garden Grove.

Firefighters are spraying down the tanks to maintain proper temperature.

Citizen user video shows liquid spraying up from an unknown source inside the facility grounds.

Additionally, the OCFA has begun triaging solutions in case of a rupture without an explosion.

OCFA is continuing to work with a team of chemical experts on a plan.

The finding was discovered after an offensive posture was taken overnight, which allowed responders to read a gauge of the internal temperature of the chemical.

An update from the Unified Incident Commander Craig Covey indicated progress throughout the evening had reversed after temperature readings had increased at an average of 1 degree per hour.

Authorities have assessed several possible options once an ideal temperature is reached to prevent a rupture or explosion.

In an evening update, OCFA has advised that the temperature of the chemical inside the tank has been lowered as responders continue to work to reach a level allowing possible action.

An update from OCFA has asked the public to avoid calling emergency services with unsolicited ideas.

During the press conference, an OCFA official indicated that previous comments of authorities' inability to mitigate the tank were ' not acceptable', and several authorities from across the country are working with the OCFA for a safe resolution.

An update from authorities at a presser indicated responders continue to maintain a water curtain on the tank for temperature control.

Officials have opened evacuation centers at the Garden Grove Sports and Recreation Center and the Cypress Recreation and Community Center.

Authorities have estimated around 40,000 people have been evacuated.

The Garden Grove Unified School District remains closed.

The evacuation of nearby residents continues after a brief reprieve last night.

ABC 7 reported at press conference today, OCFA Division Chief stated: "There are literally two options left remaining: one, the tank fails and spills a total of about six-to-seven thousand gallons of very bad chemicals into the parking lot in that area -- or two, the tank goes into a thermal runaway and blows up, affecting the tanks around them that have chemicals in them as well,"

Residents are urged to follow evacuation orders and listen to all directions from first responders.

OFCA also confirms there is no active gas leak.

Evacuation orders have expanded, per OCFA personnel.

In a press conference this afternoon, first responders and HazMat units continue to operate at the scene. The tank is "actively in crisis", meaning a potential chemical spill or the possibility for a thermal runaway.

OCFA's Public Information Hotline phone number is [714-628-7085](tel:714-628-7085). Anyone seeking information or resources is asked to call this number for assistance.

The County of Orange activated and staffed the Emergency Operations Center (EOC) with County agency representatives, according to OCFA's X account.

While yesterday's cooling operation was successful, an inoperable valve on the tank has created additional operational challenges, preventing complete mitigation, according to the OCFA.

A temporary shelter has been established at Stanton City Hall at 7800 Katella Avenue.

The Orange County Fire Authority (OCFA) has re-issued evacuation orders for areas north of Garden Grove Boulevard, east of Springdale Avenue, west of Dale Street and south of Orangewood Avenue, according to CBS News. The OCFA said deputies from the Orange County Sheriff's Department will be going door to door assisting residents. The duration of the evacuation is unknown.

Evacuation orders have been lifted. However, The following street closures remain in place: Western Ave from Garden Grove Blvd to Chapman Ave, and Lampson Ave from Santa Rosalia Ave to Western Ave.

There has still been no word on injuries thus far.

CORRECTION: This incident was first responded at 3:22 p.m. on Thursday. A previous version of this incident incorrectly stated the leak occurred on Wednesday.

The address reported for this incident has changed to 12100 Western Ave.

Evacuation orders remain in place for the area north of Garden Grove Boulevard, east of Monarch Street, south of Orangewood Avenue, and west of Beach Boulevard. An evacuation site has been established at the Rancho Alamitos High School gym at 11351 Dale Street in Garden Grove.

The tank's temperature had risen, activating a relief valve designed to safely vent the pressure. An overhead sprinkler system was also activated to cool the tank. Vapor conditions have since improved and the liquid temperature is decreasing. Firefighters are using large unmanned hoses to assist with cooling while industrial cleanup contractors prepare for the next phase of operations.

At approximately 3:22 p.m. on Wednesday, firefighters responded to a facility in the 12100 block of Western Avenue after a 34,000-gallon tank containing methyl methacrylate—an industrial chemical used in plastics and manufacturing—released vapors.

Orange County hazmat teams are at the scene of a chemical leak from a large industrial tank at an aerospace manufacturing facility in Garden Grove, prompting evacuations of the surrounding area.

Several blocks were evacuated, per the Los Angeles Times.

The surrounding area has been evacuated as a precaution. No injuries have been reported and the cause of the leak is under investigation.

Crews responded to the facility on Western Avenue shortly before 3:40 p.m. on Wednesday after a tank containing methyl methacrylate—a flammable plastic epoxy that generates its own heat—began leaking. Firefighters are spraying the tank with water to keep temperatures down, per CBS LA. The chemical's temperature has not risen.

Orange County firefighters are responding to a hazardous materials incident at an aerospace components facility in Garden Grove after an industrial tank began leaking a flammable chemical.

Incident reported at 12000 Western Ave.

OCFA also reports the safety zone around the involved tank has now been reduced to 150 feet due to continued stabilization of conditions.

OCFA confirms all roads that were closed as a result of the Garden Grove hazardous materials incident are now open.

Officials state no current leak or threat has been found, and responders are lifting all restrictions, though Western Avenue will continue to remain closed.

An update from officials has confirmed that the evacuation orders have been lifted for all residents.

Evacuation orders still remain in effect, per OCFA.

Efforts will continue throughout the day Tuesday to maintain this temperature, while monitoring adjacent tanks for any changes.

Fortunately, the temperature of the affected tank is now holding steady at 92 degrees.

According to an update from the Orange County Fire Authority on X (formerly Twitter), crews monitored the affected tank and adjacent tanks overnight.

No civilians or firefighters have been injured.

Officials noted that around 16,000 people remain under evacuation orders, stressing that the incident is "not over yet." Crews still need to mitigate fire and spill concern, in addition to a very small explosion concern.

A new evacuation map has been shared, effective as of 6 p.m. on Monday, May 25. The red shaded area represents the newest evacuation zone, while the red outline represents the previous evacuation zone. The new borders consist of Orangewood Ave to the north, Dale St to the east, Knott St to the west, and Garden Grove Blvd to the south.

Officials announced Monday night that evacuation orders have been reduced.

More than 785 state and local emergency personnel continue to assist at the scene, including firefighters, hazmat experts, public health officials, and environmental scientists "working around the clock," per a statement from Gov. Gavin Newsom's office.

President Trump approved a Presidential Emergency Declaration for Orange County on Monday, allowing FEMA to deploy personnel, equipment, and specialized resources to support the ongoing response.

However, "there is still no chemical leak, as verified by continuous atmospheric monitoring," OCFA officials said.

Officials say that while the catastrophic risk of a massive explosion has been eliminated, there's still an ongoing threat to public safety.

UPDATE: There is no more risk of a catastrophic vapor explosion from the tank, authorities said on Monday morning.

Although a BLEVE (Boiling Liquid Expanding Vapor Explosion) is “off the table,” the evacuation zone remains in place as operations continue, authorities said. "significant public health and environmental risks remain," officials said, as a smaller explosion or leak could occur. Monday morning’s development was still called “incredibly positive news.”

During an overnight operation on Sunday, crews confirmed a pressure-relieving crack on the tank, and found that the temperature inside has stabilized down to 93 degrees.

Current instrument readings indicate no current active leak.

A tweet sent by the OCFA indicated only one crack has been identified on the tank.

Responders are planning operations during the evening hours to verify pressure readings.

Officials believe the internal tank temperature has exceeded 100 degrees and can no longer accurately measure the current temperature.

An update from officials indicates the temperature shown on the tank gauge has risen to 100 degrees, the highest possible reading on the gauge.

The OCDA said in a later update that any areas outside of the evacuation zone "are currently considered completely safe and day-to-day activities can continue as normal."

Evacuation orders remain in place. There are still tens of thousands of people evacuated—reports as of Sunday morning say it's 50,000 residents.

Authorities are continuing to develop response plans based on the information gained from the overnight inspection.

The inspection discovered a crack that may be relieving pressure and assisting in stabilizing the chemical.

In an update from the Orange County Fire Authority, responders entered the site and made a close inspection of the failing tank.

Additional state resources are continuing to support efforts at the scene.

Governor Newsom has declared a state of emergency due to the ongoing efforts in Garden Grove.

Firefighters are spraying down the tanks to maintain proper temperature.

Citizen user video shows liquid spraying up from an unknown source inside the facility grounds.

Additionally, the OCFA has begun triaging solutions in case of a rupture without an explosion.

OCFA is continuing to work with a team of chemical experts on a plan.

The finding was discovered after an offensive posture was taken overnight, which allowed responders to read a gauge of the internal temperature of the chemical.

An update from the Unified Incident Commander Craig Covey indicated progress throughout the evening had reversed after temperature readings had increased at an average of 1 degree per hour.

Authorities have assessed several possible options once an ideal temperature is reached to prevent a rupture or explosion.

In an evening update, OCFA has advised that the temperature of the chemical inside the tank has been lowered as responders continue to work to reach a level allowing possible action.

An update from OCFA has asked the public to avoid calling emergency services with unsolicited ideas.

During the press conference, an OCFA official indicated that previous comments of authorities' inability to mitigate the tank were ' not acceptable', and several authorities from across the country are working with the OCFA for a safe resolution.

An update from authorities at a presser indicated responders continue to maintain a water curtain on the tank for temperature control.

Officials have opened evacuation centers at the Garden Grove Sports and Recreation Center and the Cypress Recreation and Community Center.

Authorities have estimated around 40,000 people have been evacuated.

The Garden Grove Unified School District remains closed.

The evacuation of nearby residents continues after a brief reprieve last night.

ABC 7 reported at press conference today, OCFA Division Chief stated: "There are literally two options left remaining: one, the tank fails and spills a total of about six-to-seven thousand gallons of very bad chemicals into the parking lot in that area -- or two, the tank goes into a thermal runaway and blows up, affecting the tanks around them that have chemicals in them as well,"

Residents are urged to follow evacuation orders and listen to all directions from first responders.

OFCA also confirms there is no active gas leak.

Evacuation orders have expanded, per OCFA personnel.

In a press conference this afternoon, first responders and HazMat units continue to operate at the scene. The tank is "actively in crisis", meaning a potential chemical spill or the possibility for a thermal runaway.

OCFA's Public Information Hotline phone number is [714-628-7085](tel:714-628-7085). Anyone seeking information or resources is asked to call this number for assistance.

The County of Orange activated and staffed the Emergency Operations Center (EOC) with County agency representatives, according to OCFA's X account.

While yesterday's cooling operation was successful, an inoperable valve on the tank has created additional operational challenges, preventing complete mitigation, according to the OCFA.

A temporary shelter has been established at Stanton City Hall at 7800 Katella Avenue.

The Orange County Fire Authority (OCFA) has re-issued evacuation orders for areas north of Garden Grove Boulevard, east of Springdale Avenue, west of Dale Street and south of Orangewood Avenue, according to CBS News. The OCFA said deputies from the Orange County Sheriff's Department will be going door to door assisting residents. The duration of the evacuation is unknown.

Evacuation orders have been lifted. However, The following street closures remain in place: Western Ave from Garden Grove Blvd to Chapman Ave, and Lampson Ave from Santa Rosalia Ave to Western Ave.

There has still been no word on injuries thus far.

CORRECTION: This incident was first responded at 3:22 p.m. on Thursday. A previous version of this incident incorrectly stated the leak occurred on Wednesday.

The address reported for this incident has changed to 12100 Western Ave.

Evacuation orders remain in place for the area north of Garden Grove Boulevard, east of Monarch Street, south of Orangewood Avenue, and west of Beach Boulevard. An evacuation site has been established at the Rancho Alamitos High School gym at 11351 Dale Street in Garden Grove.

The tank's temperature had risen, activating a relief valve designed to safely vent the pressure. An overhead sprinkler system was also activated to cool the tank. Vapor conditions have since improved and the liquid temperature is decreasing. Firefighters are using large unmanned hoses to assist with cooling while industrial cleanup contractors prepare for the next phase of operations.

At approximately 3:22 p.m. on Wednesday, firefighters responded to a facility in the 12100 block of Western Avenue after a 34,000-gallon tank containing methyl methacrylate—an industrial chemical used in plastics and manufacturing—released vapors.

Orange County hazmat teams are at the scene of a chemical leak from a large industrial tank at an aerospace manufacturing facility in Garden Grove, prompting evacuations of the surrounding area.

Several blocks were evacuated, per the Los Angeles Times.

The surrounding area has been evacuated as a precaution. No injuries have been reported and the cause of the leak is under investigation.

Crews responded to the facility on Western Avenue shortly before 3:40 p.m. on Wednesday after a tank containing methyl methacrylate—a flammable plastic epoxy that generates its own heat—began leaking. Firefighters are spraying the tank with water to keep temperatures down, per CBS LA. The chemical's temperature has not risen.

Orange County firefighters are responding to a hazardous materials incident at an aerospace components facility in Garden Grove after an industrial tank began leaking a flammable chemical.

Incident reported at 12000 Western Ave.

OCFA also reports the safety zone around the involved tank has now been reduced to 150 feet due to continued stabilization of conditions.

OCFA confirms all roads that were closed as a result of the Garden Grove hazardous materials incident are now open.

Officials state no current leak or threat has been found, and responders are lifting all restrictions, though Western Avenue will continue to remain closed.

An update from officials has confirmed that the evacuation orders have been lifted for all residents.

Evacuation orders still remain in effect, per OCFA.

Efforts will continue throughout the day Tuesday to maintain this temperature, while monitoring adjacent tanks for any changes.

Fortunately, the temperature of the affected tank is now holding steady at 92 degrees.

According to an update from the Orange County Fire Authority on X (formerly Twitter), crews monitored the affected tank and adjacent tanks overnight.

No civilians or firefighters have been injured.

Officials noted that around 16,000 people remain under evacuation orders, stressing that the incident is "not over yet." Crews still need to mitigate fire and spill concern, in addition to a very small explosion concern.

A new evacuation map has been shared, effective as of 6 p.m. on Monday, May 25. The red shaded area represents the newest evacuation zone, while the red outline represents the previous evacuation zone. The new borders consist of Orangewood Ave to the north, Dale St to the east, Knott St to the west, and Garden Grove Blvd to the south.

Officials announced Monday night that evacuation orders have been reduced.

More than 785 state and local emergency personnel continue to assist at the scene, including firefighters, hazmat experts, public health officials, and environmental scientists "working around the clock," per a statement from Gov. Gavin Newsom's office.

President Trump approved a Presidential Emergency Declaration for Orange County on Monday, allowing FEMA to deploy personnel, equipment, and specialized resources to support the ongoing response.

However, "there is still no chemical leak, as verified by continuous atmospheric monitoring," OCFA officials said.

Officials say that while the catastrophic risk of a massive explosion has been eliminated, there's still an ongoing threat to public safety.

UPDATE: There is no more risk of a catastrophic vapor explosion from the tank, authorities said on Monday morning.

Although a BLEVE (Boiling Liquid Expanding Vapor Explosion) is “off the table,” the evacuation zone remains in place as operations continue, authorities said. "significant public health and environmental risks remain," officials said, as a smaller explosion or leak could occur. Monday morning’s development was still called “incredibly positive news.”

During an overnight operation on Sunday, crews confirmed a pressure-relieving crack on the tank, and found that the temperature inside has stabilized down to 93 degrees.

Current instrument readings indicate no current active leak.

A tweet sent by the OCFA indicated only one crack has been identified on the tank.

Responders are planning operations during the evening hours to verify pressure readings.

Officials believe the internal tank temperature has exceeded 100 degrees and can no longer accurately measure the current temperature.

An update from officials indicates the temperature shown on the tank gauge has risen to 100 degrees, the highest possible reading on the gauge.

The OCDA said in a later update that any areas outside of the evacuation zone "are currently considered completely safe and day-to-day activities can continue as normal."

Evacuation orders remain in place. There are still tens of thousands of people evacuated—reports as of Sunday morning say it's 50,000 residents.

Authorities are continuing to develop response plans based on the information gained from the overnight inspection.

The inspection discovered a crack that may be relieving pressure and assisting in stabilizing the chemical.

In an update from the Orange County Fire Authority, responders entered the site and made a close inspection of the failing tank.

Additional state resources are continuing to support efforts at the scene.

Governor Newsom has declared a state of emergency due to the ongoing efforts in Garden Grove.

Firefighters are spraying down the tanks to maintain proper temperature.

Citizen user video shows liquid spraying up from an unknown source inside the facility grounds.

Additionally, the OCFA has begun triaging solutions in case of a rupture without an explosion.

OCFA is continuing to work with a team of chemical experts on a plan.

The finding was discovered after an offensive posture was taken overnight, which allowed responders to read a gauge of the internal temperature of the chemical.

An update from the Unified Incident Commander Craig Covey indicated progress throughout the evening had reversed after temperature readings had increased at an average of 1 degree per hour.

Authorities have assessed several possible options once an ideal temperature is reached to prevent a rupture or explosion.

In an evening update, OCFA has advised that the temperature of the chemical inside the tank has been lowered as responders continue to work to reach a level allowing possible action.

An update from OCFA has asked the public to avoid calling emergency services with unsolicited ideas.

During the press conference, an OCFA official indicated that previous comments of authorities' inability to mitigate the tank were ' not acceptable', and several authorities from across the country are working with the OCFA for a safe resolution.

An update from authorities at a presser indicated responders continue to maintain a water curtain on the tank for temperature control.

Officials have opened evacuation centers at the Garden Grove Sports and Recreation Center and the Cypress Recreation and Community Center.

Authorities have estimated around 40,000 people have been evacuated.

The Garden Grove Unified School District remains closed.

The evacuation of nearby residents continues after a brief reprieve last night.

ABC 7 reported at press conference today, OCFA Division Chief stated: "There are literally two options left remaining: one, the tank fails and spills a total of about six-to-seven thousand gallons of very bad chemicals into the parking lot in that area -- or two, the tank goes into a thermal runaway and blows up, affecting the tanks around them that have chemicals in them as well,"

Residents are urged to follow evacuation orders and listen to all directions from first responders.

OFCA also confirms there is no active gas leak.

Evacuation orders have expanded, per OCFA personnel.

In a press conference this afternoon, first responders and HazMat units continue to operate at the scene. The tank is "actively in crisis", meaning a potential chemical spill or the possibility for a thermal runaway.

OCFA's Public Information Hotline phone number is [714-628-7085](tel:714-628-7085). Anyone seeking information or resources is asked to call this number for assistance.

The County of Orange activated and staffed the Emergency Operations Center (EOC) with County agency representatives, according to OCFA's X account.

While yesterday's cooling operation was successful, an inoperable valve on the tank has created additional operational challenges, preventing complete mitigation, according to the OCFA.

A temporary shelter has been established at Stanton City Hall at 7800 Katella Avenue.

The Orange County Fire Authority (OCFA) has re-issued evacuation orders for areas north of Garden Grove Boulevard, east of Springdale Avenue, west of Dale Street and south of Orangewood Avenue, according to CBS News. The OCFA said deputies from the Orange County Sheriff's Department will be going door to door assisting residents. The duration of the evacuation is unknown.

Evacuation orders have been lifted. However, The following street closures remain in place: Western Ave from Garden Grove Blvd to Chapman Ave, and Lampson Ave from Santa Rosalia Ave to Western Ave.

There has still been no word on injuries thus far.

CORRECTION: This incident was first responded at 3:22 p.m. on Thursday. A previous version of this incident incorrectly stated the leak occurred on Wednesday.

The address reported for this incident has changed to 12100 Western Ave.

Evacuation orders remain in place for the area north of Garden Grove Boulevard, east of Monarch Street, south of Orangewood Avenue, and west of Beach Boulevard. An evacuation site has been established at the Rancho Alamitos High School gym at 11351 Dale Street in Garden Grove.

The tank's temperature had risen, activating a relief valve designed to safely vent the pressure. An overhead sprinkler system was also activated to cool the tank. Vapor conditions have since improved and the liquid temperature is decreasing. Firefighters are using large unmanned hoses to assist with cooling while industrial cleanup contractors prepare for the next phase of operations.

At approximately 3:22 p.m. on Wednesday, firefighters responded to a facility in the 12100 block of Western Avenue after a 34,000-gallon tank containing methyl methacrylate—an industrial chemical used in plastics and manufacturing—released vapors.

Orange County hazmat teams are at the scene of a chemical leak from a large industrial tank at an aerospace manufacturing facility in Garden Grove, prompting evacuations of the surrounding area.

Several blocks were evacuated, per the Los Angeles Times.

The surrounding area has been evacuated as a precaution. No injuries have been reported and the cause of the leak is under investigation.

Crews responded to the facility on Western Avenue shortly before 3:40 p.m. on Wednesday after a tank containing methyl methacrylate—a flammable plastic epoxy that generates its own heat—began leaking. Firefighters are spraying the tank with water to keep temperatures down, per CBS LA. The chemical's temperature has not risen.

Orange County firefighters are responding to a hazardous materials incident at an aerospace components facility in Garden Grove after an industrial tank began leaking a flammable chemical.

Incident reported at 12000 Western Ave.