The threat of a tank explosion in Orange County, California, was reportedly over but the situation was still not under control, according to CNN on Monday.
At least 50,000 residents have been displaced as Gov. Gavin Newsom and President Donald Trump declared the chemical leak a national state of emergency, California state Sen. Tony Strickland (R) told CNN.
The tank at the GKN Aerospace site in Garden Grove holds methyl methacrylate, a flammable and reactive chemical used to make resins and plastics. The highly toxic chemical has raised fears of a catastrophic explosion.
"I'm very cautiously optimistic about where we are today than I was on Thursday," Strickland added.
The location is several miles from Disneyland, Knott's Berry Farm and Angel Stadium in nearby Anaheim.
First responders have been monitoring the air quality.
The Orange County Fire Authority released a public update in a post on X.
"Boiling Liquid Expanding Vapor Explosion (massive explosion) has been eliminated, there is still an ongoing threat to public safety. There is still no chemical leak, as verified by continuous atmospheric monitoring," according to the OCFA.