Illinois Severe Flash Flood Warning | Effective 08/01/2026 06:25

Headline: 
Flash Flood Warning issued August 1 at 8:25AM CDT until August 1 at 11:45AM CDT by NWS Chicago IL
Event: 
Flash Flood Warning
Urgency: 
Immediate
Effective: 
August 1, 2026 - 6:25am
Expires: 
August 1, 2026 - 9:45am
Description: 
At 825 AM CDT, Doppler radar and automated rain gauges indicated thunderstorms producing heavy rain across the warned area. Up to 4 inches of rain have fallen. Additional rainfall amounts up to 1 inch are possible in the warned area. Flash flooding is ongoing. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar and automated gauges. IMPACT...Rapid-onset flooding of creeks, streams, drainage ditches, streets, underpasses, low-lying areas, and other poor drainage areas. Some locations that will experience flash flooding include... Downers Grove, Elmhurst, Lombard, Addison, Woodridge, Glen Ellyn, Melrose Park, Maywood, Brookfield, Franklin Park, Hinsdale, Westchester, Lemont, La Grange, Burr Ridge, Oak Brook and Elmwood Park.
Instruction: 
A Flash Flood Warning means rapid-onset flooding is imminent or may already be occurring. Persons along creeks, drainage ditches, and other waterways should take immediate precautions to protect life and property. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Area Description: 
Cook, IL; DuPage, IL
Forcast Office: 
NWS Chicago IL
Sender: 
w-nws.webmaster@noaa.gov