Illinois Severe Flash Flood Warning | Effective 07-04-2026 15:09

Headline: 
Flash Flood Warning issued July 4 at 5:09PM CDT until July 4 at 10:00PM CDT by NWS Chicago IL
Event: 
Flash Flood Warning
Urgency: 
Immediate
Effective: 
July 4, 2026 - 3:09pm
Expires: 
July 4, 2026 - 8:00pm
Description: 
FFWLOT The National Weather Service in Chicago has issued a * Flash Flood Warning for... Southeastern Cook County in northeastern Illinois... * Until 1000 PM CDT. * At 509 PM CDT, Doppler radar and automated rain gauges indicated thunderstorms producing rainfall rates up to 3 inches per hour over much of the warned area. Between 2 and 3 inches of rain have fallen in portions of the warned area. Flash flooding is already occurring and significant flash flooding is expected to begin shortly. According to reports, sections of Interstate 94 are closed through parts of the south side of Chicago. 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... Oak Lawn, Calumet City, Chicago Heights, Roseland, Chicago Lawn, Midway Airport, Englewood, South Shore, Burbank, Lansing, Oak Forest, Harvey, Homer Glen, Blue Island and Dolton.
Instruction: 
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.
SNM: AVISO DE INUNDACIONES REPENTINAS hasta 10:00 PM CDT. Evite areas inundadas.
Servicio Nacional de Meteorologia: AVISO DE INUNDACIONES REPENTINAS en efecto para esta area hasta las 10:00 PM CDT. Esta es una situacion peligrosa y amenaza la vida. No intente viajar a menos que sea para abandonar un area propensa a inundaciones o bajo una orden de desalojo.
Area Description: 
Cook, IL
Forcast Office: 
NWS Chicago IL