Flash Flood in Kendall County, Illinois

Flash Flood August 18, 2025 – August 19, 2025 · Kendall County, Illinois

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Street flooding was reported on the southeast side of Yorkville with at least six inches of standing water. A few other mPing reports of street flooding came out of the Yorkville and Oswego areas.

The wider storm

During the afternoon and evening of the 18th, a few rounds of thunderstorms brought torrential rainfall to much of northern Illinois resulting in flash flooding. One particularly strong storm also produced damaging winds in DeKalb County. Initial reports estimate $8.8 million in flood damages around northern and northeast Illinois, and around $2.5 million in the city of Chicago alone.

Began near Yorkville (41.6219, -88.4374).

Source: NOAA Storm Events Database, event 1288875. Narratives are written by the National Weather Service forecast office that issued the report.

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