Garden Grove Chemical Tank Leak Forces 50,000 Evacuated

Mon Jun 01 2026 08:14:51 GMT+0000 (Coordinated Universal Time)

A cracked chemical tank in Southern California has prompted widespread evacuation and emergency response.

A 6‑ to 7‑k gallon meth‑methacrylate tank in Garden Grove, CA, cracked over the weekend, heating up and releasing vapors. Firefighters are cooling it with water, drones monitor temperature, and containment barriers are in place to protect the environment. About 50,000 residents have been evacuated by state and local officials, and a class‑action lawsuit is already in motion.

Garden Grove Chemical Tank Leak Forces 50,000 Evacuated

A large chemical tank in Garden Grove, Southern California, cracked over the weekend and began venting vapors. Firefighters are spraying the tank with water to keep the temperature rise from triggering a potentially explosive scenario, while drones monitor temperatures every ten minutes. The scale of the incident prompted Gov. Gavin Newsom to declare a state of emergency and request President Donald Trump’s help for federal support. Some 50,000 residents have been ordered off‑premises for safety.

Officials Working to Prevent a Disaster

The tank, owned by GKN Aerospace Transparency Systems, stores 6,000‑to‑7,000 gallons of methyl methacrylate used in aircraft parts. Its interior temperature climbed to 100 °F (38 °C) on Sunday, up from 90 °F (32 °C) the day before. The crack that opened has lowered the chance of a massive blast, but experts warn that the release of heat and pressure can still lead to a dangerous explosion.

Orange County Fire officials sprayed the tank with water and are using containment panels to keep any leaks from reaching storm drains or the ocean. Satellite‑smoke sensors and precautionary barriers aim to isolate the chemical. Purdue University engineering professor Andrew Whelton compared the tank to a soda can: the crack lets pressure escape, reducing the risk of a full vapor‑cloud explosion.

Dealing with Displacement and Health Concerns

Aerial footage shows most streets empty, with evacuation shelters open and high schools serving as makeshift sleeping areas. Nearby Anaheim’s Disneyland, however, was not under evacuation orders; park officials are watching the situation closely.

Methyl methacrylate is known to cause severe respiratory and neurological problems, and its odor is easily detectable. Orange County health officials say the chemical is easy to smell, suggesting residents can detect exposure even without full containment. A detailed air‑monitoring effort is underway to specifically detect methyl methacrylate, rather than generic volatile organic compounds.

Residents Taking Legal Action

Garden Grove residents filed a class‑action lawsuit against GKN Aerospace, arguing that the incident will affect property values regardless of the eventual outcome. GKN has apologized and stated that it is working “around the clock” to mitigate the risk of a leak. The company previously settled for more than $900,000 with the South Coast Air Quality Management District over past regulatory violations.

AP journalist Ethan Swope in Garden Grove contributed to this report.