CHICAGO | An active Flood Advisory is in effect for Chicago and Cook County. CGN News is publishing this alert because official National Weather Service alert data includes one or more CGN coverage areas: Cook County, Illinois.
What is active now
The primary active alert is Flood Advisory with NWS severity listed as Minor, urgency listed as Expected and certainty listed as Likely.
The alert became effective 2 July 2026 at 11:51 PM EDT. The current listed expiration or ending time is 3 July 2026 at 3:00 AM EDT. Readers should rely on the latest county-specific National Weather Service alert before making safety decisions.
Current official alerts
Flood Advisory: NWS lists the affected area as Cook, IL; DuPage, IL; Kane, IL; Kendall, IL; Will, IL. Current listed expiration or ending time: 3 July 2026 at 3:00 AM EDT.
Flood Advisory: NWS lists the affected area as Cook, IL; DuPage, IL. Current listed expiration or ending time: 3 July 2026 at 2:30 AM EDT.
Coverage area
This CGN alert covers Cook County, Illinois. Nearby communities may experience different conditions, and warnings can change quickly.
Safety
Do not drive through floodwater. Water can be deeper than it appears, and roads may be damaged beneath the surface. Keep children and pets away from flooded creeks, ditches, drainage areas and riverbanks.
Official instruction
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.
This alert should be updated if the National Weather Service issues, cancels, extends or replaces the active alert. Do not rely on this article alone for emergency decisions. Keep wireless emergency alerts enabled and monitor official NWS, NOAA, local emergency management and trusted local broadcast sources.
Additional Reporting By: National Weather Service; NOAA; National Weather Service Chicago