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Flash Flood in Lake County, Indiana

Flash Flood August 18, 2025 · Lake County, Indiana

$4.0M
Damage as recorded

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

What the National Weather Service wrote

Several instances of flash flooding took place around Gary, Hammond, Whiting, and East Chicago. A sewer storage facility exceeded capacity and overflowed. Multiple basements were flooded in Hammond. Up to three feet of water was reported on Indianapolis Blvd in Whiting from 120th to 129th Street. A portion of US-20 in East Chicago was closed due to flooding. Numerous reports of flooded basements, roads, and yards came out of the east side of Hammond and the west side of Gary. One private weather weather station in the area recorded 5.21 inches of rain while two others nearby recorded over three inches. An estimated 1,000 structures flooded around the area amounting to roughly $4 million in damages.

The wider storm

A series of strong thunderstorms brought torrential rain and flooding to portions of far northwestern Indiana during the evening and night of the 18th. Automated rain gauges and Cocorahs reports from northern Lake and Porter Counties generally ranged between two and four inches with isolated reports closer to five inches. Initial estimates have around 1,000 structures flooded in Lake County amounting to near $4 million in damages.

Began near Whiting (41.7050, -87.5232).

Source: NOAA Storm Events Database, event 1292412. Narratives are written by the National Weather Service forecast office that issued the report.

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