A flash flood warning has been issued for Wyandotte County until 3:45 a.m., according to the National Weather Service.
At 9:50 p.m. Aug. 21, Doppler radar showed thunderstorms with heavy rainfall overspreading the area, according to the weather service.
Rainfall rates of 2 to 3 inches per hour are expected with this area of storms as it moves into the region, according to the weather service.
Some areas, especially Platte and Clay counties, have already seen as much as 4 to 5 inches of rain from storms earlier in the day and with the newer activity moving into the area, the weather service said.
Flash flooding is expected to occur throughout the night.
Residents are advised not to drive through flooded roads.