Illinois Flood Warning | Effective 04/18/2026 18:35

Headline: 
Flood Warning issued April 18 at 8:35PM CDT by NWS Chicago IL
Event: 
Flood Warning
Urgency: 
Immediate
Effective: 
April 18, 2026 - 6:35pm
Expires: 
April 19, 2026 - 12:45pm
Description: 
...The Flood Warning is extended for the following rivers in Illinois... Des Plaines River at Lincolnshire affecting Cook and Lake IL Counties. ...The Flood Warning continues for the following rivers in Illinois... Des Plaines River near Des Plaines affecting Cook County. Des Plaines River near Russell affecting Lake IL County. Des Plaines River near Gurnee affecting Lake IL County. * WHAT...Minor flooding is occurring and moderate flooding is forecasted. * WHERE...Des Plaines River from Palatine Road in Prospect Heights downstream to Irving Park Road in Chicago, including the Des Plaines gauge. * WHEN...Until further notice. * IMPACTS...At 18.5 feet, Big Bend Road threatened in Des Plaines. * ADDITIONAL DETAILS... - At 7:45 PM CDT Saturday the stage was 17.5 feet. - Forecast...The river is expected to rise to a crest near 18.0 feet tomorrow evening. It will then slowly fall through next week. - Flood stage is 15.0 feet. - http://www.weather.gov/safety/flood
Instruction: 
A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based almost entirely on observed precipitation as little to no additional precipitation is currently expected over the next 24 to 48 hours. Additional information is available at www.weather.gov. The next statement will be issued by Sunday afternoon.
Area Description: 
Cook, IL
Forcast Office: 
NWS Chicago IL