Authorities in southern California ordered the evacuation of 40,000 people on Friday after a huge storage tank began leaking a hazardous chemical used to make plastic parts, posing the risk of an explosion.

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.