A critical situation is unfolding in Southern California, where a chemical tank near Disneyland is at risk of exploding or leaking, prompting the evacuation of 40,000 residents. The tank, containing methyl methacrylate at an aerospace facility in Garden Grove, has overheating issues and non-functional pressure relief valves.
Authorities are in a desperate race against time to cool the tank and prevent a catastrophic release, which could cause severe respiratory and neurological problems, leading to significant stress and frustration among the displaced community.
Authorities in Southern California are on high alert, bracing for the potential explosion or catastrophic leak of a damaged chemical tank that has forced 40,000 residents to evacuate their homes. The evacuation order, issued ahead of the Memorial Day weekend, remains in effect with no clear timeline for residents' return.
The incident began Thursday when a pressurized tank containing methyl methacrylate overheated and started venting vapors at an aerospace plastics facility in Garden Grove. Miraculously, no injuries have been reported, according to the Orange County Fire Authority.
Garden Grove, located approximately 38 miles (61 kilometers) south of downtown Los Angeles, has seen several shelters established in local high schools. While Garden Grove is adjacent to Anaheim, home to Disneyland's two popular theme parks, the amusement parks themselves are not under evacuation orders. Disneyland officials have stated they are closely monitoring the situation and supporting affected employees.
Firefighters' primary goal is to cool the chemical within the tank to prevent a leak or explosion. If cooling proves impossible, Purdue University engineering professor Andrew Whelton suggested a controlled leak might be preferable to an explosion, which could scatter the chemical over a wide area and propel dangerous shrapnel. The worst-case scenario involves the tank's internal temperature continuing to rise, building pressure as the liquid methyl methacrylate converts to gas, especially since the tank's pressure relief valves are reportedly non-functional.
Professor Whelton noted that creating a hole in the tank is unlikely to be considered due to the risk of sparks igniting the volatile and flammable gas. Orange County Fire Authority Division Chief Craig Covey reported that a gauge read Friday night showed the tank's internal temperature at 90 degrees Fahrenheit, an increase from 77 degrees earlier Friday. Covey confirmed that the tank's valves are either broken or 'gummed up,' preventing crews from either removing the chemical or relieving the dangerous pressure build-up.
Tank Wasn't Cooling as First Thought
Initial reports suggested efforts to cool the tank were successful on Friday. However, Chief Covey later clarified that drone readings had mistakenly shown the *external* tank temperature, not the internal one. Emergency crews later managed to get an in-person reading of the troubled tank's internal temperature gauge.
"Unfortunately, I do have to report that the temperature was 90 degrees," Covey stated on Saturday, correcting the earlier optimistic assessment. Cooling the tank is critical because methyl methacrylate's flashpoint is a low 50 degrees Fahrenheit (10 degrees Celsius), according to the National Institute for Occupational Safety and Health.
Residents are Frustrated and Stressed
Initially, only Garden Grove residents were ordered to leave. By Friday, the evacuation zone expanded to include parts of five other Orange County cities: Cypress, Stanton, Anaheim, Buena Park, and Westminster. Many residents with pets expressed intentions to sleep in their vehicles.
Marco Solano, a 32-year-old resident, spent Friday night at his parents' home, expressing his frustration with the situation. "I don't think that they should have dangerous chemicals in a neighborhood area, especially that dangerous that they have to evacuate people," Solano remarked. He also shared that the stress of the chemical leak was exacerbating his anemia and ulcerative colitis, leaving him feeling "extremely tired... super weak."
After grabbing belongings from his apartment on Friday, Solano observed other residents who had not evacuated, raising concerns for their safety.
Exposure Could Lead to Health Problems
The compromised tank is situated at GKN Aerospace, a company that manufactures components for commercial and military aircraft. The tank contains between 6,000 and 7,000 gallons (22,700 and 26,500 liters) of methyl methacrylate, a chemical integral to plastic manufacturing.
Chief Covey emphasized the gravity of the situation: "Letting this thing just fail and blow up is simply unacceptable to us."
Exposure to methyl methacrylate can lead to severe respiratory issues, unconsciousness, neurological problems, and irritation of the skin, eyes, and throat, as detailed in chemical fact sheets. Professor Whelton, who studied the devastating 2023 train derailment in East Palestine, Ohio, noted that while the volume of chemical in the California tank is significantly smaller than the 115,000 gallons of vinyl chloride released in Ohio, the risks are still substantial.
Orange County, part of the extensive Los Angeles metropolitan area, benefits from first responders highly trained in hazardous materials incidents, unlike the volunteer firefighters with fewer specialized resources in East Palestine. Whelton stressed that the effects of methyl methacrylate exposure are often "acute, fast-acting," and prolonged contact increases the potential for significant harm.
Should an explosion occur, Whelton advises that detailed air monitoring specifically for methyl methacrylate, rather than generic tests for volatile organic compounds, will be crucial. General tests, often performed with handheld detectors, may not detect the specific chemical. Indoor testing of buildings and homes might also be necessary before residents can safely return.
Weather conditions will play a critical role in determining the trajectory of any chemical plume post-explosion, and officials are developing maps to predict affected areas. Furthermore, containment barriers have been erected to prevent any spilled chemical from entering storm drains, creeks, or the nearby ocean.
California Governor Gavin Newsom declared a state of emergency in Orange County on Saturday, unlocking state resources for local agencies and allowing the use of state-owned properties as shelters if required.
