Authorities in Southern California are scrambling to find a safe resolution as a damaged chemical tank at an aerospace facility poses a threat of a leak or even an explosion. The storage tank at GKN Aerospace in Garden Grove, Orange County, contains approximately 6,000 to 7,000 gallons (22,713 to 26,498 liters) of methyl methacrylate, a hazardous chemical used in plastic production. The tank overheated last week and began leaking vapors, prompting an evacuation order affecting over 50,000 residents over the Memorial Day weekend. No injuries have been reported, but officials warn the tank could leak all its contents or explode if it overheats further.
Why Is This Chemical Dangerous?
Methyl methacrylate is a flammable, colorless liquid regulated by the federal government as a hazardous substance. It is used in resins, plastics, and plastic dentures. According to the Environmental Protection Agency, the chemical can irritate the lungs, eyes, and skin. High doses may cause reduced lung function, dizziness, and memory problems. Air monitoring tests have so far found pollution levels within normal limits around the evacuation zone.
What Is the Problem with the Tank?
The tank's drainage valves are not functioning, leaving officials with limited options to remove the chemical. Without intervention, the risk of a large spill or explosion persists. Firefighters are continuously spraying the tank with water to keep its temperature below 85 degrees Fahrenheit (29.4 degrees Celsius) to relieve pressure. On Sunday, EPA chief Lee Zeldin stated that the most likely scenario is a controlled low-volume release, allowing authorities to monitor, neutralize, and contain the threat.
What Happens If It Explodes?
If the internal temperature rises, methyl methacrylate converts from liquid to gas, building pressure and increasing explosion risk. An explosion could ignite other tanks at the site and release the chemical into the air, creating hazardous vapors. Orange County's top health officer, Dr. Regina Chinsio-Kwong, warned that inhaling the vapor could cause irritation to the eyes, nose, and lungs, leading to sore throat, burning eyes, and dizziness. Prolonged exposure may cause serious respiratory problems or unconsciousness. The evacuation zone is west of Anaheim, home to Disneyland’s theme parks, which are not under evacuation orders. Dr. Chinsio-Kwong assured that people outside the zone need not worry about health impacts.
What Happens Next?
On Sunday, officials reported a possible crack in the tank, which may lower the explosion risk. Orange County Fire Authority Captain Wayhowe Huang stated that emergency crews spotted the crack overnight, but no toxic chemical was being released. Zeldin emphasized that a controlled release would allow monitoring and pressure relief. GKN Aerospace confirmed it continues to work with local authorities, stating that the situation remains ongoing.
