Southern California authorities evacuate 40,000 people as a leaking chemical tank threatens explosion in Orange County. The crisis began Thursday at a GKN Aerospace facility in Garden Grove, where a storage tank containing 22,700 to 26,500 liters of methyl methacrylate—a highly flammable chemical used in plastics and resins—overheated and began releasing toxic vapors, officials said.
Firefighters managed to lower the tank’s temperature, buying crews additional time to stabilize the situation, according to Al Jazeera . Despite the intervention, authorities warned of two possible outcomes: a catastrophic rupture or an explosion, prompting mandatory evacuations across a wide radius. The chemical, which can cause respiratory distress and skin irritation, has already forced some residents to report symptoms, though no serious injuries have been confirmed.
The evacuation zone covers parts of Garden Grove, Santa Ana, and surrounding areas, with emergency shelters set up at local schools and community centers. Orange County officials urged residents to leave immediately, emphasizing the risk of rapid escalation. "We are treating this as an active crisis," a spokesperson told *The Guardian* . Air quality monitors have detected elevated levels of methyl methacrylate downwind, though concentrations remain below immediate health thresholds.
GKN Aerospace, the facility’s operator, has not commented on the cause of the leak, but state regulators have launched an investigation. The company, which supplies components to the aerospace industry, has faced previous scrutiny over safety protocols, though no violations have been linked to this incident.
With the tank’s structural integrity still in question, authorities have not set a timeline for residents to return. The U.S. Chemical Safety Board has dispatched a team to assist, while local hospitals remain on high alert for potential chemical exposure cases. The incident comes amid heightened scrutiny of industrial storage practices following a 2024 explosion at a Texas chemical plant that killed 15 workers.
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