Residents near Atlanta were asked again to shelter in place if a chemical cloud moved over their neighborhood as plumes from a chemical plant fire continued to shift overnight.

People in the northern part of Rockdale County were ordered to evacuate and others were told to shelter in place with windows and doors closed.

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.