A flash flood warning has been issued for Wyandotte County, according to the National Weather Service, until 11:30 p.m.
At 8:25 p.m., local law enforcement officials reported heavy rain across the warned area. Flash flooding is already occurring.
Kansas City, Kansas, Bonner Springs and Edwardsville are in the flash flooding area, the weather service said. Neighboring counties also may be in the flooding area.
The weather service advised to turn around when encountering flooded roadways and do not attempt to drive through them. Be especially cautious at night, the weather service said.