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Flash Flood Warning — Cook County, IL, DuPage County, IL, Kane County, IL
Flash Flood Warning
Issued
3:55 PM CDT · Sat, Jul 4 2026
Expires
7:00 PM CDT · Sat, Jul 4 2026
Issuing Office
NWS KLOT

Affected Areas

Cook County, IL DuPage County, IL Kane County, IL

Official Bulletin

027
WGUS53 KLOT 042055
FFWLOT
ILC031-043-089-050000-
/O.NEW.KLOT.FF.W.0030.260704T2055Z-260705T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Chicago IL
355 PM CDT Sat Jul 4 2026

The National Weather Service in Chicago has issued a

* Flash Flood Warning for...
  Northwestern Cook County in northeastern Illinois...
  Northwestern DuPage County in northeastern Illinois...
  Northeastern Kane County in northeastern Illinois...

* Until 700 PM CDT.

* At 355 PM CDT, Doppler radar and automated rain gauges indicated
  thunderstorms producing rainfall rates of up to 2 to 3 inches per
  hour. Up to 3 inches of rain have fallen in portions of far
  northeast Kane County. 1 inch of rain was reported in about 15
  minutes in Barlett. Flash flooding is already occurring according
  to reports from the Elgin area.

  HAZARD...Significant flash flooding.

  SOURCE...Radar and automated gauges.

  IMPACT...Rapid-onset, significant flooding of creeks, streams,
           drainage ditches, low-lying areas, and poor drainage
           areas. Widespread street and underpass flooding.
           Possible flooding of structures. Possible flooding of
           highways.

* Some locations that will experience flash flooding include...
  Elgin, Schaumburg, Wheaton, Hoffman Estates, Bartlett, Streamwood,
  Carol Stream, Hanover Park, Carpentersville, St. Charles,
  Algonquin, West Chicago, Huntley, Campton Hills, Roselle,
  Bloomingdale, South Elgin, Winfield, Pingree Grove and Gilberts.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Warning means rapid-onset flooding is imminent or may
already be occurring. 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. Most flood
deaths occur in vehicles.

&&

LAT...LON 4215 8843 4215 8841 4215 8840 4215 8838
      4215 8816 4199 8810 4186 8812 4188 8826
      4190 8826 4190 8843

FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL RATE...2-3 INCHES IN 1 HOUR

$$

RC