Overview
- A leak at an aerospace site in Garden Grove led authorities to order roughly 40,000 residents to evacuate after the tank began releasing vapors and threatening rupture, a crisis that began on Friday.
- Fire crews have continuously sprayed the 26,000‑litre methyl methacrylate tank to lower its temperature, but readings rose from about 25°C to about 32°C and faulty valves have blocked drainage attempts.
- State officials declared an emergency to speed sheltering and resources and local teams are installing barriers to keep any spilled chemical out of storm drains, waterways and the nearby ocean.
- Thousands of residents have refused evacuation orders, complicating sheltering and safety operations, though officials report no injuries so far and the company GKN Aerospace says it is working to limit the leak.
- Responders reported a possible fissure that may be relieving pressure, which officials called a positive sign, but they continue to weigh a controlled release against the risk of an uncontrolled explosion and ongoing monitoring is in place.