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Crews investigating if OC chemical tank pressure has been relieved after crack discovered

Last updated: Monday, May 25, 2026 7:01AM GMT
Firefighters conduct high-risk operation at chemical tank in OC

GARDEN GROVE, Calif. (KABC) -- Authorities are urgently trying to stop a pressurized tank filled with a toxic chemical at the GKN Aerospace facility from exploding in Garden Grove.

The "crisis situation" has forced 50,000 people out of their homes in Orange County.

In a Sunday afternoon update, Orange County Fire Authority Interim Chief TJ McGovern said firefighters did "a recon mission on the tank" late Saturday night, during which they discovered a crack, which could be relieving some of the pressure.

In a later update, OCFA said an all-night mission will be conducted to confirm if the pressure in the tank has been released and that the threat of a catastrophic explosion has been eliminated.

"The BLEVE threat is the worst-case catastrophic event that we have been talking about. We are not there yet. We need to run this operation tonight," McGovern said.

In the meantime, residents are being asked to continue to avoid the evacuation zone.

Any areas outside of the evacuation zone "are currently considered completely safe and day-to-day activities can continue as normal."

So far, no injuries have been reported.

It was unclear what initially caused the material in the tank to overheat.

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May 24, 2026, 4:28 AM

Map shows evacuation order impacting 50,000 Orange County residents

The evacuation zone for a "crisis situation" in Garden Grove spans several blocks. Authorities say 50,000 residents are impacted. They are urging everyone in the zone to leave for their safety immediately.

The evacuation zone covers the area north of Trask Avenue, south of Ball Road, east of Valley View Street and west of Dale Street.

Small portions of West Anaheim, Cypress and Buena Park are also included in the evacuation zone, as well as the city of Stanton.

The Garden Grove Police Department said they did reverse 911 calls and went door to door, urging people to leave. They said as of Friday afternoon, there was about a 15% refusal rate.

A public information hotline was established at 714-628-7085. Another 24-hour call center is available at 714-741-5444.

City News Service contributed to this report.

May 24, 2026, 7:34 PM GMT

New evacuation center opens as others reach capacity

A new evacuation center has been established as several others begin to reach capacity.

According to the American Red Cross, the new center is in Fountain Valley at Los Amigos High School, located at 16566 Newhope St. Officials said pets are welcome and the center is available for overnight stays.

The centers at Golden West College in Huntington Beach, Savanna High School in Anaheim, Freedom Hall in Fountain Valley, John F. Kennedy High School in La Palma, and Oceanview High School in Huntington Beach are listed as "nearing/at capacity."

The Red Cross said those impacted are still welcome to stop by those locations to use other shelter services or grab a meal or a snack.

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May 24, 2026, 7:24 PM GMT

Level of pollutants around evacuation zone normal, no contaminants observed

According to the Orange County Fire Authority, any areas outside of the evacuation zone are considered "completely safe" and noted that day-to-day activities can resume as normal.

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May 24, 2026, 6:29 PM GMT

Crews find crack in tank, gain positive intel that could shift response strategy

Firefighters gathered "positive intel" during an overnight operation that could shift the response strategy for the chemical tank crisis in Garden Grove, officials said during a Sunday morning update posted on social media.

A specialized team of subject matter experts developed a plan to get eyes on the tank. During the operation, firefighters were able to visually examine the tank and discovered a potential crack, which may be helping relieve pressure.

"During that operation, our firefighters went in, and they were able to visualize the tank," said Interim Orange County Fire Authority Chief TJ McGovern. "What they found was a potential crack in the tank, which could potentially be relieving some of the pressure in there."

He said officials are now reviewing and confirming that information, which could play a key role in determining how crews move forward.

"We took that information, we got data on it, and right now this morning, what we're doing is we are vetting and validating that information," McGovern said. "With this new information, it could change our trajectory and our strategy to this event."

McGovern said the operation was successful, although the situation is not yet resolved.

"We're not there yet, but this was a step in a right direction, and there's going to be a lot more coming shortly," he said.

"Your protection, your life safety is our paramount responsibility right now," McGovern added. "We know you're out of your homes, we want to get you back, but we cannot do that until it's deemed safe."

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1:09 AM GMT

Resources for residents evacuated due to chemical tank crisis

About 50,000 residents are under mandatory evacuation orders due to the ongoing chemical tank crisis in Garden Grove.

Here is a list of resources for evacuees:

  • Garden Grove Emergency Hotline: 714-741-5444
  • O.C. Public Information Hotline: 714-628-7085
  • Disaster Distress Helpline: Call or text 1-800-985-5990