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California tank holding dangerous chemicals is set to explode or leak, officials say. Here's what to know

Updated on: May 23, 2026 / 9:33 PM EDT / CBS News

California tank holding dangerous chemicals is set to explode or leak, officials say. Here's what to know

TL;DR

  • Tens of thousands evacuated due to a leaking chemical tank at GKN Aerospace in Garden Grove, California.
  • The tank holds 7,000 gallons of methyl methacrylate, a highly flammable and volatile substance.
  • Officials warn the tank could fail, leading to an explosion or a large spill.
  • Governor Gavin Newsom declared a state of emergency for Orange County, mobilizing state resources.
  • Efforts are underway to keep the tank cooled, as internal temperatures are increasing.
  • Homes within a one-mile radius have been evacuated; there is no timeline for their return.
  • Methyl methacrylate is a respiratory irritant and can cause lung, skin, and eye irritation, nausea, and dizziness.
  • Authorities have used sandbags to create containment barriers to prevent chemicals from entering storm drains or waterways.
  • The cause of the leak is currently under investigation.