Severe · Flood WarningActive alert
Flood Warning issued September 20 at 9:45AM CDT until September 21 at
Affecting Cook, IL; Lake, IN
In effect until: Sep 21, 2026, 6:00 AM
Cook, IL; Lake, IN
Confirmed across 2 counties in IL and IN; expires 6:00 AM.
Avoid flooded areas. Move to higher ground if water is rising near you.
Read the original bulletin (official text)
...The Flood Warning continues for the following rivers in Illinois...Indiana... Little Calumet River at Munster (Hohman Avenue) affecting Lake IN and Cook Counties. For the Little Calumet River...including South Holland, Munster (Hohman Avenue)...Minor flooding is forecast. * WHAT...Minor flooding is forecast. * WHERE...Little Calumet River from IN-912 in Hammond downstream to confluence with Thorn Creek in South Holland, including the Munster (Hohman Avenue) gauge. * WHEN...Until late tonight. * IMPACTS...At 12.5 feet, Most areas outside of the levee-protected area are inundated in Hammond and Munster. * ADDITIONAL DETAILS... - At 9:00 AM CDT Sunday the stage was 9.3 feet. - Forecast...The river is expected to briefly rise and crest to around flood stage of 12.0 feet late this afternoon into early evening. It will then fall below flood stage late this evening. - Flood stage is 12.0 feet. - http://www.weather.gov/safety/flood
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™