Calif. Officials Warn Of Chemical Spill, Explosion Risk As 40,000 Evacuated

Fire officials in California issued urgent evacuation orders Friday after authorities warned that a massive chemical storage tank at an aerospace manufacturing facility was “actively in crisis” and could spill or explode.

Emergency crews have been working around the clock at GKN Aerospace, a facility that manufactures engine structures and other components for commercial and military aircraft, after discovering that a large tank was releasing toxic fumes, according to reports.

Officials determined Thursday night that methyl methacrylate, commonly known as MMA, was leaking from a 34,000-gallon storage tank. The chemical is a volatile and highly flammable plastic epoxy used in aerospace manufacturing.

Firefighters initially launched emergency cooling operations in an effort to stabilize the tank, according to reporting from FOX 11 Los Angeles. At first, officials believed the situation had been brought under control and allowed residents to return home.

By Friday morning, however, the situation had worsened dramatically.

“We have determined that the tank that is in the biggest crisis is in fact unable to be secured and mitigated,” Incident Commander and Orange County Fire Division Chief Craig Covey said, per reports.

Officials said emergency crews are now preparing for two dangerous possibilities: the tank could rupture and spill thousands of gallons of hazardous chemicals, or rising internal temperatures could trigger what authorities described as a “thermal runaway” event, potentially causing an explosion.

“This is highly volatile, it’s highly toxic, it’s highly flammable,” Covey said during the press briefing, while urging people to evacuate.

“This is not precautionary. This is gonna happen unless some brilliant guy behind me here figures out how we can mitigate this incident,” he added.

“This thing is gonna fail — we don’t know when,” he said.

Authorities said a rupture could release an estimated 6,000 to 7,000 gallons of what officials described as “very bad chemicals” into the surrounding area and nearby parking lot.

The second concern is even more serious. Officials warned that a thermal runaway event could cause an explosion and potentially set off a chain reaction involving nearby tanks containing fuel and other hazardous materials.

“We are setting up these evacuations in preparation for these two options: It fails, or it blows up,” Covey said.

Officials stressed that there was no active gas leak or toxic plume at the time of the briefing, but they urged residents to follow evacuation orders immediately. Fire officials did not provide a timeline for when a possible rupture or explosion could occur.

Garden Grove Police Chief Amir El-Farra announced an expanded evacuation zone, saying officials were acting to protect residents from an imminent threat.

“Community safety is our highest priority, and we want to see this come to a successful resolution, but we need your help,” El-Farra said.

Two emergency evacuation centers have been opened for displaced families in Garden Grove and Cypress. Local law enforcement and mutual aid partners remain on scene as emergency crews monitor the unstable tank.

No injuries or fatalities had been reported as of this writing.

Rep. Derek Tran, D-Calif., said he is monitoring the toxic leak and remains in regular contact with local police, fire and emergency response officials.

“I am in contact with federal disaster relief officials, including FEMA and the EPA, to urge them to provide any available federal assistance for Garden Grove,” Tran wrote in a statement.

“I encourage everyone in the affected area to follow guidance from local authorities and avoid the impacted zones until further guidance is issued,” he added.

The crisis is likely to raise broader questions about industrial safety, hazardous chemical storage, and whether local communities are being given enough protection when dangerous materials are housed near residential areas. For families forced from their homes, however, the immediate priority is simple: follow official evacuation orders and stay clear until authorities confirm the threat has passed.