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 ...

Emergency crews continue to work around the clock to prevent a chemical plant in Garden Grove from leaking or exploding, with an estimated 50,000 Orange County residents under evacuation orders.

Concerns over a possible explosion or leak prompted evacuation orders for tens of thousands of residents, many of whom are staying in shelters.