According to Mark Dean with the U.S. Army Corps of Engineers at Lake Okatibbee and supervisor Craig Hitt, water could get up and over Gin Creek Causeway around midnight Friday.
If so, the causeway will be closed. It's being monitored continuously.
Officials say there is no danger to the levee or to homes.
Meanwhile, in Brandon, Miss., another storm has ripped through the area leaving mangled trees, damaged cars, and debris in its path.
A resident in this neighborhood described the sound when the storm rolled through.
"Like a roaring freight train. It sounded like a freight train. We heard the trees snapping," said Teresa Scott.
Many houses just south of downtown Brandon were covered by debris. Homes were completely destroyed, while pictures were found spread across the yard.
The only room still left intact at Scott's home was the bathroom, where the family took cover.
After the strong storm subsided and the damage was assessed many residents in the area were just happy to be alive.
"Yes, yes, it is a miracle that we got out alive," said one.
Crews worked throughout the day cleaning up downed trees and trying to restore power to the area. The number of residents without power dropped from about 7,000 to 1,800 Friday.
Crews are expected to restore power to most areas by Friday evening.
Gov. Ronnie Musgrove has declared a state of emergency in Hinds, Madison, and Rankin Counties.
The Associated Press contributed to this report.