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Leaking chemical tank forces mass evacuations in Southern California

newsMay 23, 2026351,610

A leaking 7,000-gallon methyl methacrylate storage tank in Orange County, California forced mandatory evacuations for about 40,000 people on Friday. Emergency officials warned the tank was "actively in crisis," at risk of rupturing or exploding, and said there was no active gas plume but the tank could not be secured. Schools inside the evacuation zone closed and responders worked to contain the leak while residents left multiple neighborhoods and key roads. The incident matters because methyl methacrylate is highly flammable and a tank failure could cause fires, injuries, widespread property damage, and prolonged displacement for thousands.

Matt Novak
@paleofuture.bsky.social

Sounds like things are not going well in Orange County, California, where 10,000 people have been told to evacuate because of a toxic chemical leak at the GKN Aerospace facility.

New York Times: Craig Covey, an incident commander with the Orange County Fire Authority, said in a video update that the most compromised tank at the facility contains about 7,000 gallons of a toxic chemical and has started to bulge — a sign of potential crisis.
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13 minutes ago
Heather Knight
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Two shelters have been made available for residents evacuated from their homes, according to the state's Office of Emergency Services. They are at a recreation center in Garden Grove and a community center in Cypress, both just outside the evacuation zone.
96517d ago
Matt Novak249

“There are only two ways the situation could possibly unfold, according to the Orange County Fire Authority, and neither of them is good. The tank could either fail and spill thousands of gallons of toxic chemicals, or it could explode.” abc7.com/amp/post/tan...

Original CMH55

For those who want to know it's methyl methacrylate. Volatile and flammable.

Emily PhD 🎓29

Reddit thread for that is here, for locals www.reddit.com/r/orangecoun...

Rebecca Schoenkopf25

40,000, and 15 percent are refusing to leave

Antifa Hoagie Assassin16

This is a tricky problem. Methyl methacrylate isn't especially toxic, so it won't be terribly harmful or difficult to clean up. But it's VERY flammable, and burns very hot, which if the tank ruptures or explodes, can set fire to a *lot* of tanks that *DO* have extremely dangerous stuff in them.

BLISS USA FREEDOM FIGHTER15

GKN Aerospace facility a global Corporation who should have been regulating toxic chemical tanks. Health and Safety laws and regulations have obviously been ignored.

Ohio Todd11

Walk into the wind, folks. That's the only thing I have learned from listening to hundreds of hours of disaster podcasts.

no one9

i feel really bad for all the orange county residents who aren’t republicans

Sy Oppington, fellow poster6

At least they weren't subject to oppressive government regulations and oversight. That would be the real tragedy!

Lee Rowan 🐕 🐈‍⬛ 🌳 🌈 🏳️‍🌈 🇨🇦 🐉 🇺🇦🦇🪶🖋️ 🇺🇸4

This kind of thing was predicted in 1970... by scientists extrapolating what would happen if humans ignored the overpopulation/pollution crisis. And here we are.

Kathy Byrne2

update on the 6p news, they reported the temperature has stabilized a bit which will buy them more time to figure something out but earlier had said the cylinder’s valves & mechanisms have been rendered useless

Eno2

@dirkwilbury.bsky.social @cgillespie62.bsky.social is this near you??

KurasuSoratobu2

The words 'the most compromised tank' are just chilling. WHY IS THERE MORE THAN ONE TANK COMPROMISED IN THE FIRST PLACE?!

Partially.Convinced+2

Huh, they should just follow Texas’ lead and dump it in a nearby stream, or vent it (liquid or gas).

Governor Gavin Newsom
@governor.ca.gov

If you're in the area impacted by this incident in Garden Grove, follow local evacuation orders and guidance from local emergency officials. Get the latest information ➡️ ggcity.org/emergency

KTLA (May 22, 2026 at 2:23 PM):

#BreakingNews: Thousands of Orange County residents remained under evacuation orders Friday after officials warned that a massive storage tank leaking hazardous chemicals at a Garden Grove aerospace facility could potentially rupture or explode. Fire officials said in a news conference Friday that the situation had escalated significantly overnight and warned that crews had been unable to fully stabilize the overheating 34,000-gallon tank containing methyl methacrylate, a volatile and highly flammable industrial chemical.
48417d ago
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