A fire at the BioLab facility in Conyers, Georgia, has led to elevated chlorine levels in the air, causing health concerns across the region. Sunday's fire led to air quality monitoring, which detected hazardous chlorine levels and prompted a shelter-in-place order. The Georgia Emergency Management and Homeland Security Agency has warned that people in metro Atlanta may wake up Thursday to a chlorine odor and haze as winds shift. Officials are working to neutralize the chemicals.