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California chemical tank igniting after evacuation in LA suburban suburb, fire official

The incident commander reported on Saturday that firefighters trying to prevent a chemical explosion in Southern California discovered overnight that the tank, which was failing, was "heating up" internally despite attempts to cool it.

The evacuation orders were still in effect for a?area that covered tens and thousands of residents in the Garden Grove suburb in Los Angeles.

California Governor Gavin Newsom declared a state of emergency in Orange County, and his office asked residents to evacuate.

Craig Covey said that crews returned to the danger zone overnight in Garden Grove after drone readings suggested on Friday that water sprayed onto the tanks helped stabilize the situation.

Covey explained in a Saturday morning video that the drones only measured the exterior of the vessel and not the chemical within. The crews found that the temperature inside the tank was 90 degrees Fahrenheit, or 32 degrees Celsius. This is up from the 77 degrees Fahrenheit or 25 degrees Celsius when the responders pulled back.

He said that the temperature was increasing by one degree per hour. Covey told Covey, "That is the bad news."

Since Friday, officials have warned that the tank containing methyl methacrylate (a flammable chemical commonly used in plastics and manufacturing) could rupture, spilling up to 7,000 gallons of toxic material, or explode, endangering nearby tanks.

Covey, a firefighter from Covey Fire Protection Services, said that firefighters were investigating whether a large flow of cooling water could?slow down the curing inside the tank to the point where it would reduce pressure and stop an explosion.

Covey stated that "we cannot allow this to fail and explode." "Our goal is to not let that happen."

The incident started on Thursday, at the GKN Aerospace plant in Garden Grove. This city has a population of 172,000 and is located about 30 miles (50km) south of Los Angeles. According to the site's website, it specializes in manufacturing and testing windows and canopies of commercial and military aircraft.

GKN stated that it was working with "all the relevant experts" to resolve the problem.

GKN's spokesperson issued a statement on Saturday apologizing for the inconvenience caused to local residents and business owners who were forced to evacuate.

On Friday, officials expanded evacuation orders after the explosion risk increased. According to Amir El-Farra, Garden Grove Police chief, about 15% of the people living in the area covered by the order refuse to leave.

Covey stated that crews switched from a defensive to offensive operation over night with the help of chemists in the emergency response team from the manufacturer. The goal was to neutralize the nearby 15,000-gallon storage tank and reduce its potential explosiveness if it failed.

Covey stated, "We put people in danger last night."

Garden Grove, Anaheim, and Cypress are all nearby cities that have been evacuated.

Officials from the Department of Health have expressed concern that prolonged exposure to vapor could lead to severe respiratory problems. As of the last health update, air-quality monitors did not detect vapor.

"You're safe so long as you stay out of the area that was determined as an evacuation zone," said Dr. Regina Chinsio Kwong, of the Orange County Health Care Agency on Friday.

Covey stated that crews were also prepared for a potential spill, looking at ways to dike, dam, and divert liquids into a holding zone on the commercial site rather than allowing them to reach storm drains or river channels, or the ocean.

Covey stated, "We will not give up." (Reporting from Rodrigo Campos, New York; additional reporting by Dan Catchpole. Editing by Sergio Non & David Gregorio).

(source: Reuters)