Active Weather Alerts
Flood Advisory
Issued: 10:13 PM Aug. 1, 2026 – National Weather Service
...FLOOD ADVISORY NOW IN EFFECT UNTIL 7 PM CDT THIS EVENING... * WHAT...Flooding caused by excessive rainfall continues. * WHERE...Southeastern Cook County in northeastern Illinois... Northern Grundy County in northeastern Illinois... Southern Kendall County in northeastern Illinois... Northwestern Will County in northeastern Illinois... Northern Lake IN County in northwestern Indiana... Northern Porter County in northwestern Indiana... * WHEN...Until 700 PM CDT. * IMPACTS...Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Underpasses may be flooded. Roads and streets may be flooded. * ADDITIONAL DETAILS... - At 509 PM CDT, Doppler radar and automated rain gauges indicated that light to moderate rainfall was occurring in areas where heavy rainfall occurred a few hours ago. Minor flooding is ongoing in the advisory area. Up to 2.5 inches of rain have fallen in the past 3 to 6 hours. - Some locations that may experience flooding include... Chicago, Joliet, Hammond, Gary, Orland Park, Tinley Park, Oak Lawn, Romeoville, Plainfield, Calumet City, Portage, Roseland, Englewood, South Shore, East Chicago, Burbank, and Lansing. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Advisory means minor flooding along waterways and other poor drainage areas is imminent or may already be occurring. Persons in the advisory area should use caution and avoid flood waters. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. &&
Flood Advisory
Issued: 10:08 PM Aug. 1, 2026 – National Weather Service
...FLOOD ADVISORY NOW IN EFFECT UNTIL 7 PM CDT THIS EVENING... * WHAT...Lingering flooding caused by earlier excessive rainfall continues. * WHERE...East Central Cook County in northeastern Illinois... Southern DuPage County in northeastern Illinois... Northern Kendall County in northeastern Illinois... Northwestern Will County in northeastern Illinois... * WHEN...Until 700 PM CDT. * IMPACTS...Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. High water may recede slowly from flooded areas. * ADDITIONAL DETAILS... - At 507 PM CDT, Doppler radar and automated rain gauges indicated that heavy rain fell across the advisory area earlier today. Lingering, localized minor flooding is ongoing in some parts of the advisory area. - Some locations that may experience flooding include... Chicago, Aurora, Naperville, Cicero, Bolingbrook, Berwyn, Wheaton, Oak Park, Downers Grove, Elmhurst, Lombard, Romeoville, Plainfield, Woodridge, Oswego, Midway Airport, Austin, South Lawndale and Chicago Lawn. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Advisory means minor flooding along waterways and other poor drainage areas is imminent or may already be occurring. Persons in the advisory area should use caution and avoid flood waters. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. &&
River Flood Warning
Issued: 9:50 PM Aug. 1, 2026 – National Weather Service
...FLOOD WARNING IN EFFECT UNTIL SUNDAY MORNING... * 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 Sunday morning. * IMPACTS...At 12.5 feet, Most areas outside of the levee-protected area are inundated in Hammond and Munster. * ADDITIONAL DETAILS... - At 4:00 PM CDT Saturday the stage was 11.5 feet. - Forecast...The river is expected to rise above flood stage late this afternoon to a crest of 12.5 feet this evening. It will then fall below flood stage just after midnight tonight. - Flood stage is 12.0 feet. - http://www.weather.gov/safety/flood &&
Flood Advisory
Issued: 9:01 PM Aug. 1, 2026 – National Weather Service
...FLOOD ADVISORY IN EFFECT UNTIL 7 PM CDT THIS EVENING... * WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Southeastern Cook County in northeastern Illinois... Central Will County in northeastern Illinois... * WHEN...Until 700 PM CDT. * IMPACTS...Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Roads and streets may be flooded. * ADDITIONAL DETAILS... - At 400 PM CDT, Doppler radar and automated rain gauges indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Up to 1.5 inches of rain have fallen in the past one to two hours. - Some locations that will experience flooding include... Chicago Heights, Lansing, Park Forest, Matteson, Frankfort, Steger, Richton Park, Sauk Village, Flossmoor, Lynwood, Glenwood, Crete, University Park, Manhattan, Monee, Olympia Fields and Ford Heights. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Advisory means minor flooding along waterways and other poor drainage areas is imminent or may already be occurring. Persons in the advisory area should use caution and avoid flood waters. &&
River Flood Warning
Issued: 7:44 PM Aug. 1, 2026 – National Weather Service
...FLOOD WARNING IN EFFECT UNTIL SUNDAY MORNING... * WHAT...Minor flooding is forecast. * WHERE...Thorn Creek from Near Glenwood downstream to confluence with Little Calumet River, including the Thornton gauge. * WHEN...Until Sunday morning. * IMPACTS...At 9.0 feet, Water begins to be diverted through Thorn Creek Diversion Tunnel. * ADDITIONAL DETAILS... - At 2:15 PM CDT Saturday the stage was 8.6 feet. - Forecast...The river is expected to rise above flood stage late this afternoon to a crest of 10.0 feet this evening. It will then fall below flood stage late tonight. - Flood stage is 9.0 feet. - http://www.weather.gov/safety/flood &&
Flood Watch
Issued: 3:22 PM Aug. 1, 2026 – National Weather Service
...FLOOD WATCH IN EFFECT UNTIL 7 PM CDT THIS EVENING... * WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Portions of central and northeast Illinois, including the following areas, in northeast Illinois, Central Cook, DuPage, Eastern Will, Grundy, Kendall, Northern Cook, Northern Will, Southern Cook and Southern Will. In central Illinois, Livingston. * WHEN...Until 7 PM CDT this evening. * IMPACTS...Flooding may occur in poor drainage and urban areas. Area creeks and streams are already elevated, increasing the risk of flooding due to additional rainfall. * ADDITIONAL DETAILS... - A slow moving weather system may bring additional periods of heavy showers and embedded thunderstorms which may lead to localized flooding. Portions of the Flood Watch have already received 2 to locally 4 inches of rainfall and are more susceptible to renewed flash flooding if and where additional heavy rain occurs through early this evening. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Watch for flash flooding means rapid-onset flooding is possible, but not yet certain, based upon the latest forecasts. Flash flooding is a dangerous situation. Persons with interests along area rivers, creeks, and other waterways should monitor the latest forecasts and be prepared to take action should flooding develop. &&
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