National Weather Service Issues Flash Flood Warning For Will And Kendall Counties
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The National Weather Service issued an urgent flash flood warning covering northern Will County and Kendall County in Illinois on Saturday morning, August 1, 2026. Severe thunderstorms generating torrential rainfall moved rapidly across the region, dropping between 2 and 3 inches of rain locally in a short operational window. Meteorological tracking indicated that additional rainfall amounts up to 1 inch remained possible as the convective system progressed. The warning encompassed numerous municipalities, including Joliet, Naperville, Bolingbrook, Romeoville, Plainfield, Oswego, Lockport, Yorkville, Minooka, Crest Hill, Montgomery, Shorewood, Boulder Hill, Fairmont, Rockdale, and Crystal Lawns. Emergency management authorities warned residents to prepare for rapid-onset flooding affecting small creeks, streams, drainage ditches, street networks, and underpasses. Local transportation routes experienced water accumulation, prompting police departments to urge motorists to avoid flooded lanes and adhere to turnaround safety advisories. Municipal emergency crews remained on standby as weather radar tracked continued storm movement across northern Illinois.
Timeline
- On July 27, 2026, severe storms produced tornadoes and torrential rains across Illinois.
- On July 30, 2026, the National Weather Service updated local severe weather records.
- On August 1, 2026, at 3:27 AM CDT, NWS Chicago issued hazardous weather outlooks.
- On August 1, 2026, at 6:25 AM CDT, a flash flood warning was declared.
- On August 1, 2026, at 6:40 AM CDT, local reports confirmed heavy rainfall accumulations.
- On August 1, 2026, storms dropped two to three inches of local rain.
- Presently, emergency management crews monitor flooded street networks and rapid-onset creeks.
- Presently, police departments enforce safety advisories across Will and Kendall counties.
- Future weather monitoring systems will track convective storm shifts more accurately.
- Future regional infrastructure updates will mitigate urban flash flooding risks effectively.
Sources
JQJO Editorial Desk · Human reviewed · AI assisted. Report a correction.





























