Overview
- Officials confirmed Monday that a storage tank of methyl methacrylate at GKN Aerospace in Garden Grove overheated and developed a fissure that relieved pressure, reducing the chance of a catastrophic boiling liquid expanding vapor explosion (BLEVE).
- California secured a Presidential Emergency Declaration on May 25 to speed federal aid and let FEMA provide specialized personnel, equipment and logistical support to active response operations.
- Evacuation orders have been narrowed from roughly 50,000 people to about 16,000, but restricted perimeters, temporary shelters and school closures remain in place while teams continue inspections.
- Response crews have kept the tank cooled with continuous water spray, neutralized nearby tanks when needed, and deployed air and water monitors that so far report no confirmed contamination.
- Health officials warn methyl methacrylate can irritate lungs and eyes, so residents should follow official return orders and expect ongoing structural checks and months of environmental monitoring before all restrictions are lifted.