More than 50,000 people in California remain evacuated due to an Orange County chemical leak that prompted Gov. Newsom to request that President Trump issue a Federal Emergency Declaration.

Southern California officials have expanded an evacuation zone in several Orange County cities over a toxic chemical tank that they say is "actively in crisis."

Authorities in Orange County say they’re unable to control the valves on a tank that contains methyl methacrylate, a chemical used in the manufacture of plexiglass.