A shelter-in-place order remained in effect Monday in parts of greater Atlanta after a chemical fire at a pool cleaning facility shot plumes of black smoke into the air, forced evacuations and closed roads,

For everyone sheltering in place, the best practice is to turn the air conditioning off and keep windows and doors shut,” a statement said.

A fire broke out at the BioLab plant in Conyers Sunday morning, about 40 miles southwest of Athens. Water from the plant’s sprinklers set off a chemical reaction that caused a massive plume of smoke that could be seen for miles.