Some water levels may rise to moderate flood stage as well, said Robinson.
The Meramec River spilled its banks, covering a now-closed Corisande Hills Road. Residents who live near the road, located just south of Fenton, said flooding is not unusual for this area.
"I've lived here for four years, and I can't think of one time the road hasn't flooded at least three of four times in the season," said resident Haley Hord.
Officials are also watching another hot spot south of Fenton, where Romaine Creek and other creeks nearby can fill up fast and reach a neighboring mobile home community.
Robinson said the chance for flash flooding is high when the soil becomes highly saturated with water due to continuous downpours.
Driving through high waters can be dangerous and is not recommended, according to emergency officials.