About 40,000 people are under evacuation orders and schools have shut down in Southern California due to a hazardous chemical leak. Officials say a storage tank began leaking a chemical used in making plastic parts.

Officials responding to an “unprecedented” situation involving a potential chemical leak of a “tank actively in crisis” since Thursday in Orange County, California, said Saturday the plan is shifting ...

Thousands of Garden Grove residents are under evacuation orders as a precaution.