Active Weather Alerts
River Flood Warning
Issued: 1:01 AM Aug. 15, 2026 – National Weather Service
...FLOOD WARNING NOW IN EFFECT UNTIL MONDAY MORNING... * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Thorn Creek from Near Glenwood downstream to confluence with Little Calumet River, including the Thornton gauge. * WHEN...Until Monday morning. * IMPACTS...At 13.5 feet, Chicago Heights Glenwood Road threatened in Glenwood. Residential parking lots threatened along Margaret Street in Thornton. * ADDITIONAL DETAILS... - At 7:45 PM CDT Friday the stage was 9.4 feet. - Forecast...The river may fall to near flood stage late this evening, although additional rainfall in the forecast may prolong flooding impacts, resulting in another rise on Saturday into Saturday evening. - Flood stage is 9.0 feet. - http://www.weather.gov/safety/flood &&
Flood Watch
Issued: 2:14 AM Aug. 15, 2026 – National Weather Service
...FLOOD WATCH REMAINS IN EFFECT THROUGH SATURDAY MORNING... * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of north central and northeast Illinois including Lee, Ogle, DeKalb, Kane, Kendall, DuPage, Cook, and northern Will counties. * WHEN...Through Saturday morning. * IMPACTS...Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas, especially in the vicinity of storm drains that are clogged by leaf debris. Underpasses and viaducts may flood in urban areas, as well. * ADDITIONAL DETAILS... - Another round of torrential rain-producing showers and storms is expected across the watch area tonight. Saturated soils and torrential downpours will set the stage for flash flooding. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts. Have multiple ways to receive warning information including at least one way that will wake you up. &&
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