A burst of heavy rain caused some roadways and neighborhood streets to flood around noon in O’Fallon.
The storm dumped about an inch and a half of rain in 90 minutes, while nearby communities, such as Belleville, saw only a sprinkle. U.S. 50 was covered with water just east of the entrance ramps to Interstate 64 near Schmitt Cadillac.
Jim Sieveking, a meteorologist with the National Weather Service, said this sort of localized rainfall is common.
“Whenever you have about an inch an hour somewhere, that’s a pretty efficient rainfall,” he said.
Detective Nicholas Schmidt of the O’Fallon Police Department warned residents via the Nextdoor app to use extra caution if they have to drive.
“I’ve lived in O’Fallon my whole life and there are areas flooded that I’ve never seen before,” he wrote.
Schmidt stated that O’Fallon police and fire are compiling a list of those locations to give to the Department of Public Works when the storm is over. Representatives from the departments could not be immediately reached Monday afternoon.
The weather service issued a Flash Flood Watch Monday for St. Clair County. The watch is expected to last until 1 a.m. Tuesday. For both Belleville and O’Fallon, showers and thunderstorms are forecast and could produce locally heavy rain.
One Facebook user said a maintenance person had driven through the water three times on Monday, but couldn’t get close enough to fix the drain in front of her home. She also said the amount of damage done to her vehicles, trailer and yard was “extreme.”
“I’ve lived in O’Fallon for over 45 years and I saw flooding today in places I’ve never seen water before,” another woman commented.