Illinois Flash Flood Warning | Effective 05/18/2026 13:56
At 356 PM CDT, emergency management reported thunderstorms producing
heavy rain across the warned area. Between 2 and 4.5 inches of rain
have fallen. Additional rainfall amounts of 0.5 to 1 inch are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Emergency management reported.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.