Early Friday in Garden Grove, a 34,000-gallon storage tank at an aerospace plant on Western Avenue began belching a visible plume of chemical vapor, setting off a major hazmat response and forcing nearby residents out of their homes. Helicopter footage captured the vapor venting from the tank as emergency crews rushed in, and officials quickly set up a reunification center at Rancho Alamitos High School for evacuees.
Officials Identify Chemical and Order Evacuations
According to ABC7 Los Angeles, the Orange County Fire Authority determined the tank was leaking methyl methacrylate (MMA), a liquid used in making acrylic plastics. ABC7 Los Angeles reported that Air7 aerial footage showed the chemical release and that residents in the surrounding neighborhood were evacuated while hazmat teams worked to secure the site.
Why Methyl Methacrylate Is Hazardous
CAMEO Chemicals from NOAA notes that methyl methacrylate is highly flammable, with vapors that are heavier than air and can move along the ground to potential ignition sources. The CDC's NIOSH Pocket Guide adds that MMA vapors can irritate the eyes and respiratory system, and that higher exposures may trigger dizziness or other neurological symptoms. Those combined risks are why responders treat an MMA release as both an immediate inhalation concern and a serious fire hazard.
Plant Background and On-Scene Response
GKN Aerospace operates a transparency-manufacturing facility in Garden Grove and has recently discussed expanding production at the site, according to GKN Aerospace. Hazmat crews from the Orange County Fire Authority, along with local police, responded to contain the leak and keep the vapors from finding a spark, ABC7 Los Angeles reported.
Where Evacuees Were Directed and How to Get Updates
Officials directed those forced from their homes to a reunification center at Rancho Alamitos High School. The school is listed at 11351 Dale Street in the California Department of Education records. Residents are being urged to monitor official city and county channels for the latest shelter information and guidance on when it is safe to return.
What Neighbors Should Watch For
If you were in the evacuation zone and start experiencing breathing problems, severe eye irritation, dizziness or other worrying symptoms, medical experts say you should seek care and clearly tell providers about the potential chemical exposure. Those health warnings come from the CDC's NIOSH Pocket Guide. Emergency crews and public health authorities are conducting air monitoring and will only clear residents to go back once testing shows the area is safe.
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