A fire in the plant near Atlanta caused water to interact with a chemical that set off the plume. A shelter-in-place order was extended Monday morning.

A chemical plant fire that ignited Sunday has left more than 90,000 residents of a Georgia county sheltering in place. The big picture: Air quality surveys detected chlorine, a harmful irritant, in the air emitting from the Conyers,

A fire at a chemical plant in Conyers, Georgia, on Sunday caused residents to evacuate or shelter in place in an effort to avoid exposure to a chemical plume, and shelter-in-place mandates remained in place Monday morning.