There is no longer a risk of a compromised chemical tank exploding in the suburbs of Los Angeles, but evacuation orders for more than 50,000 people remain in effect, according to the Orange County Fire Authority.

Southern California officials on Monday say the risk of a devastating vapor explosion has been avoided in an incident involving a storage tank containing methyl methacrylate, a toxic chemical used to ...

Firefighters celebrated the appearance of a crack in the tank over the weekend, which helped relieve pressure, and the tank had cooled slightly.