On May 23, 2026, a dangerous chemical incident at a GKN Aerospace facility in Garden Grove, Southern California, triggered widespread disruption that displaced nearly 50,000 Orange County residents just days before U.S. President Donald Trump greenlit a federal emergency declaration to boost response efforts. The unfolding crisis, which began when a 34,000-gallon storage tank holding highly flammable methyl methacrylate — an industrial chemical key to acrylic plastic manufacturing — began overheating and releasing toxic vapor, prompted immediate mandatory evacuation orders across six local communities: Garden Grove, Anaheim, Buena Park, Cypress, Stanton and Westminster.