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Areal Flood Warning — Cook County, IL, De Kalb County, IL, DuPage County, IL, Kane County, IL
Areal Flood Warning
Issued
6:48 PM CDT · Sat, Jul 4 2026
Expires
11:00 AM CDT · Sun, Jul 5 2026
Issuing Office
NWS KLOT

Affected Areas

Cook County, IL De Kalb County, IL DuPage County, IL Kane County, IL

Official Bulletin

286
WGUS43 KLOT 042348
FLWLOT

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Chicago IL
648 PM CDT Sat Jul 4 2026

ILC031-037-043-089-051600-
/O.NEW.KLOT.FA.W.0011.260704T2348Z-260705T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cook IL-De Kalb IL-DuPage IL-Kane IL-648 PM CDT Sat Jul 4 2026

...FLOOD WARNING IN EFFECT UNTIL 11 AM CDT SUNDAY...
...REPLACES FLASH FLOOD WARNINGS PREVIOUSLY IN EFFECT...

* WHAT...Flooding caused by excessive rainfall continues.

* WHERE...Portions of north central and northeast Illinois,
  including the following counties, in north central Illinois, De
  Kalb. In northeast Illinois, Cook, DuPage and Kane.

* WHEN...Until 1100 AM CDT Sunday.

* 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. High water likely may recede slowly from flooded areas.

* ADDITIONAL DETAILS...
  - At 644 PM CDT, local law enforcement, emergency dispatch
    centers, and highway departments reported flooding across the
    area. Between 1 and 2 inches of rain have fallen from earlier
    thunderstorms. While heavy rainfall has ended, some flooding
    will be slow to recede. Some streams may continue to rise
    over the next few hours.
  - Some locations that will experience flooding include...
    Chicago, Aurora, Naperville, Elgin, Cicero, Arlington
    Heights, Schaumburg, Palatine, Des Plaines, Berwyn, Mount
    Prospect, Wheaton, Hoffman Estates, Oak Park, Downers Grove,
    Elmhurst, Lombard, Bartlett, Ohare Airport and Streamwood.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flood Warning means flooding is imminent or may already be
occurring. Persons along rivers, creeks, and other waterways should
take immediate precautions to protect life and property.

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 4188 8860 4189 8855 4190 8841 4206 8842
      4214 8841 4214 8821 4208 8797 4180 8758
      4178 8777 4181 8818 4194 8809 4198 8813
      4197 8822 4184 8826 4178 8839 4181 8860
      4184 8880

$$

WSL