Authorities in Southern California are preparing for the potential leak or explosion of a damaged chemical tank, prompting an evacuation order for 40,000 residents. The evacuation, which began on Memorial Day weekend, affects residents in Garden Grove and surrounding areas, including Cypress, Stanton, Anaheim, Buena Park, and Westminster. No injuries have been reported following an incident on Thursday when the pressurized tank began venting vapors due to overheating.
Craig Covey, a division chief with the Orange County Fire Authority, stated that the valves on the tank are malfunctioning, hindering efforts to relieve pressure. Firefighters are attempting to cool the chemical inside the tank, which contains methyl methacrylate, a substance used in plastic production. If the temperature inside the tank continues to rise, the pressure will increase as the chemical converts from liquid to gas.
Purdue University engineering professor Andrew Whelton noted that a leak would be preferable to an explosion, which could disperse the chemical widely and cause significant damage. Monitoring efforts include using drones to track temperature changes every ten minutes. Covey emphasized the importance of preventing any leaks from spreading to nearby waterways.
Residents have expressed frustration over the situation, with some reporting stress and health issues related to the evacuation. The chemical, while detectable by smell, can cause serious respiratory and neurological problems upon exposure. Health officials have indicated that the volume of methyl methacrylate in the tank is significantly less than that involved in the 2023 train derailment in East Palestine, Ohio.
If an explosion occurs, officials anticipate severe structural damage and significant harm in the immediate vicinity of the tank. Detailed air monitoring for methyl methacrylate will be essential if the chemical is released into the air.