Authorities say heavy smoke is causing low visibility along Interstate 20 east of Atlanta from chemicals spewing from a beleaguered chlorine facility.

A small fire on the plant’s roof was initially contained but reignited Sunday afternoon, authorities said. More than 90,000 residents east of Atlanta were told to keep sheltering in place Monday a day after a chemical plant fire sent a massive plume of dark smoke high into the sky that could been seen for miles.