What to Know Evacuation orders remain in effect for about 50,000 people as firefighters worked to reduce the risk of a toxic chemical tank explosion at a Garden Grove aerospace facility. Some evacuation shelters were at capacity after authorities warned people of a possible toxic chemical spill or explosion of the overheating chemical tank at GKN Aerospace.

Emergency crews launch overnight mission to neutralize a volatile chemical tank at a Southern California aerospace facility in Garden Grove as Gov. Gavin Newsom declares state of emergency.

Evacuation orders were issued to 40,000 Orange County residents. A fire official said a major spill or an explosion were the only expected outcomes.