Chemical Tank Crisis: 40,000 Evacuated in SoCal
More than 40,000 residents across six Orange County cities have been ordered to evacuate their homes as emergency crews race to prevent a catastrophic failure of a chemical storage tank at a GKN Aerospace facility in Garden Grove, California. The 34,000-gallon tank containing methyl methacrylate (MMA) — a highly flammable and toxic industrial chemical — has entered a state of critical failure, with officials warning that it will either spill thousands of gallons of hazardous material or explode.
The Crisis
The Orange County Fire Authority (OCFA) responded to a vapor release from the tank on Thursday, May 21, at the GKN Aerospace manufacturing plant in Garden Grove, approximately 30 miles south of Los Angeles and less than a mile from Disneyland. After an initial evacuation was lifted Thursday night when cooling operations appeared successful, the situation deteriorated dramatically on Friday morning when officials determined the tank was “unable to be secured and mitigated.”
According to ABC News, OCFA Division Chief Craig Covey outlined two grim scenarios: “One, the tank fails and spills a total of about 6- to 7,000 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 that are around them.”
Covey stressed the urgency of the situation, stating, “This is highly volatile, it’s highly toxic, it’s highly flammable. This is not precautionary. This is gonna happen unless some brilliant guy behind me here figures out how we can mitigate this incident.”
Evacuation and Response
The evacuation zone covers portions of Garden Grove, Cypress, Stanton, Anaheim, Buena Park, and Westminster, bounded by Ball Road to the north, Trask Avenue to the south, Valley View Street to the west, and Dale Street to the east. Over a dozen schools in the Garden Grove Unified School District have been closed until further notice.
As reported by USA Today, Garden Grove Mayor Stephanie Klopfenstein urged residents to comply: “To everyone still in evacuation areas, please leave immediately. This is a serious situation and now it is not the time to wait.”
Garden Grove Police Chief Amir El-Farra said approximately 15% of residents under evacuation orders were refusing to leave, according to The Guardian. Authorities have been conducting reverse 911 calls and going door-to-door to ensure compliance.
Health Risks
Methyl methacrylate is an industrial chemical used in plastics and resin manufacturing. According to Orange County Health Officer Dr. Regina Chinsio-Kwong, short-term exposure can cause significant respiratory irritation, nausea, and dizziness. “At very high levels, it can really cause severe respiratory distress and hospitalization,” she said, as reported by NPR. An explosion could release the chemical as a vapor, causing even more widespread health impacts.
Mitigation Efforts
By Friday evening, crews had managed to stabilize the tank’s temperature to approximately 61°F through a continuous curtain of water, buying precious time for engineers to devise a solution. Covey reported that teams had developed “outside the box” mitigation strategies to be implemented overnight.
“It is not OK with me just to sit back and watch this thing blow up or fail,” Covey said. “That is not acceptable to me.”
Containment barriers made of sandbags have been erected around the facility to prevent any chemical runoff from reaching storm drains, river channels, or the nearby Pacific Ocean.
Broader Implications
The incident has drawn attention from state and federal officials. California Governor Gavin Newsom has been briefed, and the California Governor’s Office of Emergency Services has deployed personnel to assist local authorities. U.S. Representative Derek Tran (D-Westminster) confirmed he has been in contact with FEMA and the EPA to request federal assistance, according to ABC7 Los Angeles.
As reported by Al Jazeera, the crisis raises serious questions about industrial safety protocols at chemical storage facilities, particularly for volatile substances like MMA. GKN Aerospace, a British-owned manufacturer that supplies components to Boeing and Airbus, stated that its priority remains “the safety of our employees, responders, and the surrounding community.”
What’s Next
As of Saturday morning, the tank’s temperature remained stabilized, but the crisis is far from over. The OCFA stated that no press conferences were scheduled unless the status changed, with the next update expected later in the morning. Additional evacuation shelters have been opened at Oceanview High School in Huntington Beach and John F. Kennedy High School in La Palma as existing shelters reached capacity.
Officials have not provided a timeline for when residents may be able to return home, and the underlying question of what caused the tank to overheat in the first place remains unanswered. For the 40,000 displaced residents, the waiting — and the uncertainty — continues.