Pictured above: Heavy rain pounds a strip mall in Green Park Wednesday. Photo by Erin Achenbach.
The National Weather Service is warning about the possibility of flash flooding through 9 tonight in South County.
The advisory only applies to south central St. Louis County and southwest St. Louis city, officials said.
Gauge reports indicate several creeks have risen close to flood stage, including Martigney Creek in Oakville and Mackenzie Creek in Shrewsbury. Gravois Creek is rising near Reavis Barracks Bridge.
Roughly two inches of rain has already fallen. The rain has already moved out of the area, and more is not expected to fall.
The NWS said the areas that “will experience flooding” include Crestwood, Concord, Sunset Hills, Sappington, Lakeshire, Affton, Lemay, Mehlville, Oakville, Green Park, Marlborough, St. George, Grantwood Village, Bella Villa, St. Louis, Webster Groves, Arnold, Shrewsbury, Glendale, Oakland, East Carondelet and Wilbur Park.
When encountering a flooded area while driving, the NWS cautions, “Turn around, don’t drown,” and says that most deaths in floods occur while people are in cars.
“Excessive runoff from heavy rainfall will cause flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other drainage areas and low lying spots,” the NWS said in its latest advisory.