Thousands of people were told to stay home with their windows shut Monday after a fire at a Georgia industrial plant caused a chemical reaction that prompted around 17,000 people to evacuate Sunday and left potentially harmful chlorine lingering in the air.

"If you have concerns, stay inside, close windows and doors, and turn off ventilation systems,” Atlanta's mayor advised

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.