Flood Watch

Locations Affected

Chicago, IL ∙ Aurora, IL ∙ Joliet, IL ∙ Naperville, IL ∙ Rockford, IL ∙ Elgin, IL ∙ Waukegan, IL ∙ Cicero, IL ∙ Hammond, IN ∙ Evanston, IL

Full Alert Message

Flood Watch National Weather Service Chicago IL 339 AM CDT Sat Sep 19 2026 ...FLOOD WATCH REMAINS IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON... * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of Illinois, including the following areas, Central Cook, De Kalb, DuPage, Kane, Kendall, Lake IL, Lee, Northern Cook, Northern Will and Southern Cook and northwest Indiana, including the following areas, Lake IN and Porter. * WHEN...Until 1 PM CDT this afternoon. * 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... - Showers and thunderstorms will produce heavy rain this morning which may cause localized flash flooding. Additional showers and thunderstorms may produce heavy rain and localized flash flooding tonight when another flood watch for flash flooding may be needed. - 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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