Evacuation Order in Southern California Due to Chemical Tank Threat

On Monday, about 50,000 residents in Southern California remained under evacuation orders following efforts to prevent a tank with a volatile chemical from exploding at an aerospace facility in Garden Grove. Officials announced some progress but acknowledged that risks remain.

Potential Chemical Reaction

The tank in question contains methyl methacrylate, or MMA, at a GKN Aerospace facility. There is concern that the chemical could experience a “thermal runaway” reaction, raising temperatures and pressure to catastrophic levels.

Impact on Residents

Evacuations have uprooted entire neighborhoods during the Memorial Day weekend. Authorities warned that a potential explosion could also set off blasts in nearby containers.

Residents like Jackie Urquiza, who evacuated with her young son, face ongoing uncertainty. She expressed distress over the need for necessities, saying, “We don’t know how much longer it’ll be.” She was unaware that such hazardous substances were stored so close to her home until alarms woke her early in the morning.

Another evacuee, Andrea Luna, shared the difficulties she and her children faced, describing nights spent in a parking lot. “Devastating, nerve-racking,” she said of the ordeal. This sentiment was echoed by others who had to leave quickly without essential belongings.

Updates on Threat Level

Authorities indicated some progress on the situation. Specially trained teams found a crack in the tank that reduced pressure. The temperature inside the tank lowered from 100 degrees to 93 degrees.

The chance of a Boiling Liquid Expanding Vapor Explosion (BLEVE) was eliminated, according to Orange County Fire Authority interim Chief TJ McGovern. However, a threat of explosion remains without complete tank assessment.

Evacuation orders persisted as crews worked to evaluate the internal core accurately.

Company’s Response and Previous Violations

GKN Aerospace issued an apology for the incident’s impact, acknowledging the disruption caused to the community. Records reveal that GKN had previously settled environmental violations for nearly $1 million in 2021.

MMA, when stable, is harmless and used in making clear plastics and glass substitutes. Elias Picazo, a chemistry professor at USC, noted the acute toxicity hazards MMA poses when unstable, potentially causing respiratory issues.

No toxic release was detected in air monitoring, assuring residents and the EPA that no chemicals had leaked despite the tank crack.

Ongoing Investigation and Class-Action Lawsuits

The cause of the tank failure is still under investigation. At least two class-action lawsuits have already been filed in connection to this event.

The response has been limited to small teams due to the danger. Emergency protocols are in place should conditions worsen. Retuning home remains uncertain as authorities prioritize safety.