Water can cover roads without warning, and crews are urging drivers to use caution.
Georgia State Patrol urges drivers to drive under the speed limit while torrential rain is falling.
Experts say if you have to travel on a dirt road, be aware of surroundings, because the muddy ground can trap a car at any moment.
"So we definitely advise people not to cross any dirt roads if they see water crossing that road because you don't know if it's a sink hole or anything of that nature," said Sgt Shawn Urquhart with GSP."
Road conditions are expected to be hazardous through Friday evening. State troopers advise drivers not to slam on the breaks if their vehicle begins to hydroplane.