Limited visibility prompted the National Weather Service to issue a dense fog advisory until 10 a.m. Friday for parts of Middle Georgia.
Visibilities are a quarter-mile or less generally south of a line from Columbus to Macon to Swainsboro.
The advisory includes the cities of Warner Robins, Dublin, Americus, Coredele, Vidalia and Lumpkin.
The advisory covers the counties of: Houston, Macon, Bleckley, Laurens, Marion, Johnson, Emanuel, Chattahoochee, Schley, Treutlen, Stewart, Webster, Sumter, Dooly, Crisp, Pulaski, Wilcox, Dodge, Telfair, Wheeler Montgomery and Toombs counties.
The fog will create dangerous driving conditions and motorists are urged to slow down, use low-beam headlights and increase the distance between vehicles.