Authorities are racing to prevent the explosion of a leaking storage tank containing hazardous chemicals in Garden Grove, California, prompting evacuations for approximately 40,000 residents. The tank, holding methyl methacrylate, overheated and began venting vapors, posing risks of ground release or explosion. Efforts are underway to manage the tank's temperature and contain potential spills.

About 40,000 people were under evacuation orders and schools shut down Friday in Southern California after a storage tank continued to leak a hazardous chemical that officials…

About 40,000 people are under evacuation orders and schools have shut down in Southern California due to a hazardous chemical leak.