OC expands evacuations as toxic methyl methacrylate tank crisis intensifies

Orange County officials expanded evacuation zones around an aerospace facility after a tank containing methyl methacrylate began leaking. Officials warned of two worst‑case scenarios—thousands of gallons could spill or a thermal runaway could cause an explosion—leading to evacuations in Garden Grove, Cypress, Stanton and Buena Park, with evacuation centers opened. No injuries were reported as investigators examine the cause.