Flash Flood Warning Issued for Cook and DuPage Counties in Illinois
This alert is no longer in effect.
NOAA issued it on April 15, 2026, 4 months ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
A Flash Flood Warning is in effect for northern Cook and DuPage Counties in Illinois until 3:45 AM CDT on April 15, 2026, due to heavy rain causing rapid flooding.
Read this weather record in 30 seconds
- Record type
- Flash Flood Warning
- Affected area
- Northeastern Illinois
- Issued
- April 15, 2026
- Issuing authority
- NWS Chicago IL
Flood notices turn on location and timing. Treat the named area as this record's scope; do not assume nearby counties, parishes, or waterways were included.
Record status: historical. It was issued 4 months ago; use the issuing agency's live warning service for current conditions in Northeastern Illinois.
Flash Flood Warning in Illinois
Alert Details
A Flash Flood Warning has been issued by the National Weather Service (NWS) Chicago IL. It is effective from April 14, 2026, at 10:51 PM CDT until April 15, 2026, at 3:45 AM CDT.
Affected Areas
The warning affects northern Cook County and northern DuPage County in northeastern Illinois. Specific locations that may experience flash flooding include Chicago, Elgin, Arlington Heights, Evanston, Schaumburg, Palatine, Skokie, Des Plaines, Mount Prospect, Hoffman Estates, Glenview, Buffalo Grove, Bartlett, O'Hare Airport, Streamwood, Carol Stream, Hanover Park, Wheeling, Park Ridge, and Addison.
What You Should Do
Persons along creeks, drainage ditches, and other waterways should take immediate precautions to protect life and property. Turn around, don't drown when encountering flooded roads.
Expected Conditions
Thunderstorms are producing heavy rain at rates up to 2 inches per hour. Between 1 and 2 inches of rain have fallen, leading to flash flooding in creeks, streams, drainage ditches, streets, underpasses, low-lying areas, and other poor drainage areas.
Timeline
The alert is effective from April 14, 2026, at 10:51 PM CDT and expires on April 15, 2026, at 3:45 AM CDT.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,252 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to April 15, 2026.
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