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All evacuation orders lifted, no threat of explosion, fire or leak at Garden Grove chemical tank

Last updated: Wednesday, May 27, 2026 3:21AM GMT
Focus turns to preventing fire at OC tank; crews stop spraying water

GARDEN GROVE, Calif. (KABC) -- There is no longer a threat of explosion, fire or chemical leak for a damaged tank at the GKN Aerospace facility in Garden Grove, the Orange County Fire Authority announced on Tuesday night.

All evacuation orders were officially lifted at 7:30 p.m., allowing the final 16,000 evacuated Orange County residents to return home. Initially, 50,000 residents were evacuated from their homes last week.

A tank carrying 6,500 gallons of the highly toxic chemical methyl methacrylate (MMA) became unstable last week, causing the tank to heat up uncontrollably. For a few days, officials said the tank would either explode or spill out, and either outcome was inevitable.

Eventually, the tank cracked, allowing the pressure to release and eliminating the threat of a BLEVE, which stands for Boiling Liquid Expanding Vapor Explosion.

Then, crews worked a risky mission to confirm that the pressure had been released and to remove weather insulation from the outside of the tank to help the water be more efficient at cooling the temperature down.

Still, a threat remained for a fire or a small explosion. Firefighters continued to try to get the tank to stabilize and were eventually able to stop dousing it with water. On Tuesday afternoon, crews were seen freely walking around the tank and climbing on top of it.

By Tuesday night, OCFA declared that there was no longer a risk to surrounding residents and all evacuation orders were lifted. No injuries were reported.

The investigation into what caused the material in the tank to overheat is ongoing. Residents have already filed a class action lawsuit against GKN Aerospace.

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1 hour and 5 minutes ago

All evacuation orders lifted in Garden Grove chemical tank crisis

All evacuation orders are being lifted for residents impacted by the chemical tank crisis in Garden Grove, authorities say.

OCFA shared a map showing a green shaded area that represents the reopened evacuation zone.

The map also shows a red line that represents a road closure of Western between Chapman and Garden Gove Boulevard. A red circle on the map is an exclusion zone to allow hazardous materials teams to continue monitoring the tanks out of an abundance of caution, OCFA says.

Anabel Munoz Image
3 hours and 26 minutes ago

Community meeting underway for evacuees

A community meeting focusing on evacuees and resources is underway at Cal State Fullerton.

About 16,000 people remain under evacuation orders due to the chemical tank crisis in Garden Grove. Many evacuees were allowed to return home on Memorial Day after officials said the risk of a catastrophic explosion was averted. However, there is still a chance of a significantly smaller explosion or spill.

A community meeting focusing on evacuees and resources was held at Cal State Fullerton.

The community meeting runs until about 5:30 p.m. Some of those expected to be available to the public include consumer protection experts. Interim OCFA Fire Chief TJ McGovern was also expected to be there.

At 6 p.m., many will be heading to the Garden Grove City Council meeting where impacted community members are expected to call on the City Council to take action, including shutting down the facility.

Rep. Derek Tran, along with Sens. Adam Schiff and Alex Padilla called on President Donald Trump to declare a federal state of emergency, which the president did. Part of that means there is direct federal assistance for Orange County, including for cleanup.

Schiff says he has spoken with the EPA about what it will take to perform cleanup. He also responded to questions about possible criminal charges as a result of the leak.

"There is an investigation going on. I wouldn't be surprised to see an effort to recoup some of the expenses of the cleanup and the evacuation made after the investigation is done," Schiff said.

The Orange County district attorney has launched a criminal investigation into the incident.

KABC logo
May 26, 2026, 11:35 PM GMT

AIR7 video shows no water being sprayed on OC chemical tank

In an apparent positive sign, AIR7 video shows no water being actively sprayed on the unstable chemical tank at the center of a multi-day crisis

In an apparent positive sign in Garden Grove, AIR7 video from just after 4 p.m. shows no water being actively sprayed on the unstable chemical tank at the center of a multi-day crisis that triggered evacuations for thousands of Orange County residents.

Earlier Tuesday, Orange County Fire Authority officials said they were working to reduce the amount of water being applied to the tank in an effort to see if it would stabilize on its own.

Using two systems, crews have been applying millions of gallons of water to the tank for five full days, trying to cool the chemical down.

"We're going to shut down one of those two systems, and we're going to monitor the temperature. We're looking for it to stabilize. We don't want it to come up. We're hoping it comes down," Interim OCFA Chief TJ McGovern said earlier Tuesday. "If that looks good throughout the day, then we're going to shut down the second system, and we are going to watch that."

As of 4 p.m., AIR7 video shows no water being applied to the tank. Crews were seen walking around the area and climbing the top of the tank.

OCFA officials said they were hopeful that they could provide an update on the tank and evacuations by Tuesday evening.

Bianca Buono Image
3 hours and 57 minutes ago

Crews begin reducing water on OC chemical tank, seeing if it will stabilize

We're learning new details on the next steps to gain control of an unstable chemical tank and allow thousands of residents to return home.

We're learning new details on the next steps in the effort to gain control of an unstable chemical tank in Garden Grove.

Approximately 16,000 people remain evacuated due to the situation. The evacuation zone was reduced on Monday, but it still impacts people living closest to GKN Aerospace.

After eliminating the threat of a catastrophic explosion on Monday, Orange County Fire Authority crews have been working to mitigate other existing risks, such as a fire or a small explosion.

They have been slowly reducing the amount of water that they have been applying to the tank in crisis, trying to see if it can stabilize on its own.

Once they get that answer, officials can reevaluate the evacuation zones, which are currently impacting 16,000 people.

"I hope that they [GKN Aerospace] can move out of the neighborhood, because it happened one time, it can happen again," said Stanton resident Arse Garcia, who was allowed to return to his home on Monday evening.

"It was so close, and what could've happened, it's a big concern. They shouldn't be here. I know they were probably here first, but now we're populated," Stanton resident Joe Balon said.

Using two systems, crews have been applying millions of gallons of water to the tank in an effort to cool the chemical down.

"We're going to shut down one of those two systems, and we're going to monitor the temperature. We're looking for it to stabilize. We don't want it to come up. We're hoping it comes down," said Interim OCFA Chief TJ McGovern. "If that looks good throughout the day, then we're going to shut down the second system, and we are going to watch that."

Their next priority is investigating a possible leak. Officials believe the chemical, methyl methacrylate (MMA), is solidifying, but they won't know by how much until they can get inside the tank.

"We gotta get the fire problem handled first, stabilize that temperature, and then the team will make that determination -- now, how do we get inside?" McGovern said.

Those risks are why there are still thousands of residents under evacuation orders. For evacuated residents, their costs continue to climb.

Garden Grove's mayor says impacted residents should save their receipts.

"We're a working-class community. People work extremely hard, but if you're paycheck to paycheck, this was crippling for you. And so I absolutely want them to hold on to everything, and I'll do everything I can to see some cost recovery through, and those conversations are also ongoing," Mayor Stephanie Klopfenstein said.

McGovern says he hopes to get a report back by Tuesday evening, letting him know if the tank was able to stabilize on its own. Until then, they are in a holding pattern, waiting to know for certain if it is safe to let people return to their homes.