"Heavy rain is already moving through Louisiana and will continue over the next few days," AccuWeather's Alex DaSilva said.

A potential tropical storm is forming in the Gulf of Mexico — and it’s already causing chaos. The system, currently labeled Invest 93L, has a 40% chance of developing into Tropical Storm Dexter within 48 hours.

The Florida Panhandle will see heavy rainfall from Invest 93L after it reaches the Gulf on Wednesday. The greatest threat to the area at the moment is flash flooding in low-lying, poor-drainage areas and urban locations. Invest 93L is currently expected to make landfall near Louisiana's southeastern coast Thursday morning.