Firefighters trying to keep a tank of hazardous chemicals in California from exploding or leaking brought in outside experts to help prevent a catastrophe, the incident commander said on Saturday, as some nearby shelters ran out of space for evacuees. Evacuation orders remained in place for an area covering tens of thousands of people in the Garden Grove suburb of Los Angeles. California Governor Gavin Newsom declared a state of emergency for Orange County, and his office pleaded for residents