A tank of a toxic chemical is on the verge of exploding in California. 40,000 were told to run | Today’s news

Authorities are warning that a leaking methyl methacrylate tank at the Garden Grove Air Force Base could either rupture catastrophically or release a toxic plume, leaving tens of thousands of people with no choice but to flee.

Emergency authorities issued widespread evacuation orders for about 40,000 residents in several cities in Orange County, California, on Friday after a large chemical storage tank at an aerospace manufacturing plant began leaking a volatile and flammable substance, raising the specter of a catastrophic explosion or mass toxic release.

What’s going on at the Garden Grove chemical facility

The incident centers on a tank at the GKN Aerospace facility on the 12100 block of Western Avenue in Garden Grove, about 55 miles southeast of downtown Los Angeles. The tank holds 6,000 to 7,000 gallons of methyl methacrylate — a highly reactive chemical used in the production of resins and plastics — out of a total capacity of 34,000 gallons.

Authorities first received reports of a vapor leak from several chemical storage tanks at the site at approximately 3:22 p.m. Thursday. Initial evacuation orders were issued and later lifted after crews managed to cool the tanks and conditions appeared to stabilize. But on Friday, the valve controlling the leaking tank became inoperable, leaving emergency workers without a reliable means of dealing with the situation.

Two scenarios, both dangerous: What officials warn against

Incident commander Craig Covey was unsparing in his assessment of what residents were facing.

“There are literally two options left,” Covey said. “The tank will fail and spill a total of about 6-7,000 gallons of very bad chemicals into the parking lot in that area, or second, the tank will go into a thermal leak and explode, affecting the tanks around it that also have fuel or chemicals. We set up these evacuations in preparation for these two possibilities: it fails or it explodes.”

The chemical spill, while profoundly serious, was described as the more manageable of the two outcomes. Covey characterized it as a “best-case scenario,” with rescuers working to place containment barriers capable of preventing any spilled material from entering drains or river channels that flow toward the ocean.

The evacuation zone includes six cities in Orange County

The evacuation zone includes parts of Garden Grove, Cypress, Stanton, Anaheim, Buena Park and Westminster. Garden Grove Police Chief Amir El-Farra confirmed that approximately 40,000 residents fall within the affected area, although he noted that several thousand have refused to comply with the order.

No injuries had been reported as of Friday afternoon.

Aerial footage broadcast by local television stations showed jets of water directed at the tank from various angles, with a frame-mounted sprinkler system and unmanned hose lines both working to cool the vessel and reduce the risk of a thermal event.

What is methyl methacrylate and why is it dangerous?

Methyl methacrylate is a colorless liquid monomer with a sharp, distinct odor, widely used in the production of acrylic glass, dental materials, and surface coatings. Due to its characteristics, it is particularly dangerous in an uncontrolled environment.

“It’s a highly toxic substance,” Orange County Fire Department Chief Nick Freeman said. “It is extremely flammable and in its current state very reactive and can cause an explosion.”

The US Environmental Protection Agency states that methyl methacrylate is irritating to the skin, eyes and mucous membranes. Respiratory effects, including coughing and wheezing, have been documented after both short-term and long-term inhalation exposure, and neurological symptoms have also been reported after acute exposure. The agency identified a possible but unproven link between long-term exposure and colorectal cancer.

EPA supports local authorities in monitoring air quality in the affected zone. A spokesman confirmed that the Orange County Fire Authority remains the lead agency managing the emergency.

Health officials acknowledge the unprecedented nature of the crisis

Local doctor Regina Chinsio-Kwong acknowledged Friday that there is no clear precedent for the situation unfolding in Garden Grove.

“It’s a unique situation,” she told reporters. “We don’t have information about a similar situation where this happened, right? So we’re going into unique times and we have limited information.”

GKN Aerospace is responding to an emergency

GKN Aerospace, the manufacturer operating the affected equipment, confirmed it was cooperating fully with emergency services. “The situation at our Garden Grove location is still ongoing and we are fully focused on working with emergency responders and the appropriate authorities to ensure the safety of our employees and the local community,” a company spokesperson said in a written statement.

As of Friday afternoon, there were no immediate indications of what initially triggered the release of vapors on Thursday.

Residents in the evacuation zone are encouraged to follow all instructions from the Orange County Fire Department and local law enforcement. You said: optimized for SEO and google discover friendly title and meta description