The BioLab factory in Conyers, Georgia, is still burning and releasing chlorine compounds into the air, causing watery eyes and scratchy throats for people in Atlanta, and public health officials have advised those with respiratory conditions to stay indoors.

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

The fire, extinguished Sunday, caused a chemical reaction when the sprinkler system activated, mixing hazardous material on site and releasing it into the air.