Chemical tank rupture at Washington mill kills 11 workers
Chemical tank rupture at Washington mill kills 11 workers in corrosive chemical disaster.
Event / Disaster
California Chemical Plant Incident
Chemical tank overheats at GKN Aerospace facility in Garden Grove, California on May 21, 2026, causing evacuation of 50,000 residents. Methyl methacrylate tank failure caused by cooling system valve malfunction. A crack relieved pressure, preventing potential explosion. Federal and state investigations launched; multiple lawsuits filed. Separately, corrosive chemical tank ruptured at Longview, Washington paper mill five days later, killing 11 people.
2 reported locations
Daily activity
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2026-08-16 to 2026-11-13 · UTC publication dates
Coverage begins 11 Jun, 01:06 UTC
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What happened
Corrosive chemical tank ruptures at Washington paper mill, killing 11 people
Five days after the GKN Aerospace chemical emergency began, a large tank containing a corrosive chemical at a paper mill in Longview, Washington ruptured and imploded on May 26, 2026, killing 11 people. This was the second major hazardous chemical emergency on the West Coast within a week.
Orange County District Attorney launches criminal investigation into GKN Aerospace
The Orange County District Attorney's Office is conducting a criminal investigation into the GKN Aerospace facility regarding the chemical tank incident. The DA's office sent a preservation letter to GKN directing the company not to modify or destroy any evidence, which the company's outside counsel confirmed receiving.
Chemical tank overheats at GKN Aerospace facility in Garden Grove, California
A tank containing 6,000 to 7,000 gallons of methyl methacrylate overheated at GKN Aerospace Transparency Systems in Garden Grove, California on May 21, 2026. The overheating was caused by a failure of the cooling system valve that normally maintained the chemical at 50 degrees Fahrenheit. The tank temperature rose to 100 degrees Fahrenheit before crews cooled it to 92 degrees Fahrenheit by spraying water and removing insulation.
50,000 residents evacuated due to chemical emergency in Garden Grove
Authorities ordered the evacuation of approximately 50,000 residents from Garden Grove, California beginning May 22, 2026, due to fears that the overheating methyl methacrylate tank could explode catastrophically. The chemical is highly flammable and exposure can cause serious respiratory problems, neurological issues, and irritation to skin, eyes and throat. Most evacuees were able to return home over Memorial Day weekend after a crack in the tank relieved pressure and the temperature stabilized.
Multiple lawsuits filed against GKN Aerospace over chemical emergency
About a dozen people and businesses among the 50,000 evacuated have filed federal lawsuits against GKN Aerospace and parent company Melrose Industries claiming negligence and putting surrounding communities at risk. Residents reported strong odors, respiratory irritation, headaches and dizziness. Lawsuits question why the chemical plant was allowed to operate near residential areas.
FBI serves search warrant at GKN Aerospace facility
Federal authorities served a search warrant on Wednesday at GKN Aerospace Transparency Systems in Garden Grove on a warrant signed by a federal judge. The warrant authorized seizure of documents and records related to storage, use, and disposal of methyl methacrylate, samples of the chemical from any containers, and records related to cooling equipment used to control the temperature of the chemical.
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2 alternative perspectives
FBI, prosecutors pursue GKN Aerospace over chemical incident
FBI and prosecutors investigating GKN Aerospace; multiple lawsuits filed over chemical incident.
Garden Grove evacuates 50,000 residents after chemical tank incident
Chemical tank overheats at Garden Grove facility, prompting evacuation of 50,000 residents.