Illinois Flood Warning | Effective 04/18/2026 10:44

Headline: 
Flood Warning issued April 18 at 12:44PM CDT by NWS Chicago IL
Event: 
Flood Warning
Urgency: 
Immediate
Effective: 
April 18, 2026 - 10:44am
Expires: 
April 19, 2026 - 4:45am
Description: 
...The Flood Warning continues for the following rivers in Illinois... Fox River at Montgomery affecting Kendall and Kane Counties. Fox River at Algonquin Lock & Dam tailwater affecting Lake IL, McHenry and Kane Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Fox River from Red Gate Road in St. Charles downstream to Millington, including the Montgomery gauge. * WHEN...Until further notice. * IMPACTS...At 13.5 feet, Low-lying parking lots at city hall and Boy Scout Island are threatened in St. Charles. Fox River Trail is threatened at St. Mary Park in St. Charles. At 14.0 feet, Low-lying park land inundated along IL-25 between Montomgery and Oswego. Low-lying sections of Fabyan Forest Preserve near Batavia, Hurds Island and Gregory Island Park in Aurora, and Riverfront Park in North Aurora are inundated. * ADDITIONAL DETAILS... - At 12:00 PM CDT Saturday the stage was 13.7 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 12:00 PM CDT Saturday was 13.7 feet. The river has climbed slowly due to rainfall yesterday. The river is currently cresting. - Forecast...The river is expected to remain relatively steady just above flood stage for the next several days. - Flood stage is 13.5 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 morning.
Area Description: 
Kane, IL; Kendall, IL
Forcast Office: 
NWS Chicago IL