Flood Watch

Locations Affected

Chicago, IL ∙ Naperville, IL ∙ Joliet, IL ∙ Cicero, IL ∙ Schaumburg, IL ∙ Gary, IN ∙ Arlington Heights, IL ∙ Bolingbrook, IL ∙ Palatine, IL ∙ Hammond, IN

Full Alert Message

URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Chicago IL 1133 AM CDT Tue Aug 12 2025 ...FLOOD WATCH IN EFFECT THROUGH THIS EVENING... * WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Portions of northeast Illinois, including the following areas, Central Cook, DuPage, Eastern Will, Northern Cook, Northern Will, Southern Cook and Southern Will and northwest Indiana, including the following area, Lake IN. * WHEN...Through this evening. * 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... - Showers and thunderstorms are possible this afternoon and evening. Atmospheric conditions are favorable for rainfall rates up to 1-2 inches per hour. In addition to increased runoff potential due to urban land cover in the Chicago Metropolitan Area, near surface soil moisture in some areas is elevated due to recent rainfall. - 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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