California chemical tank at risk of exploding, 40,000 ordered to evacuate

Key Points:

• A damaged chemical tank containing 6,000 to 7,000 gallons of methyl methacrylate in Garden Grove, Southern California, has prompted evacuation orders for 40,000 residents with no clear timeline for their return due to risks of leaks or explosions.
• The tank's internal temperature rose to 90 degrees Fahrenheit, above the chemical's 50-degree flashpoint, with broken valves preventing pressure relief or chemical removal, complicating firefighting efforts to cool the tank.
• Exposure to methyl methacrylate can cause severe respiratory, neurological, and skin irritation, raising health concerns for residents and necessitating detailed air and indoor monitoring before re-entry.
• Evacuations expanded to nearby Orange County cities, with shelters open and officials monitoring the situation closely; Disneyland parks in adjacent Anaheim are not evacuated but are supporting affected employees.
• California Governor Gavin Newsom declared a state of emergency in Orange County to mobilize state resources and potentially use state properties as shelters, while containment measures are in place to prevent chemical runoff into local waterways.