Lee Zeldin says ‘low-volume release’ of flammable chemicals is most likely amid fears of explosion at Orange county facility near Disneyland

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.