Flood Watch Issued as Severe Storms Threaten Chicago Area

Damaging winds, large hail, and even tornadoes possible through Wednesday night

Apr. 15, 2026 at 1:56pm

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A dramatic, atmospheric landscape painting in muted tones of gray, blue, and green, depicting a flooded cityscape with buildings and roads partially submerged, under a sky filled with dark, ominous clouds. The scene conveys a sense of the overwhelming, sublime power of nature.As severe storms continue to batter the Chicago region, the city's infrastructure is dwarfed by the overwhelming power of nature.Chicago Today

A flood watch has been issued for several counties in Illinois and northwest Indiana as storms are expected to continue through late Wednesday night, bringing the risk of flash flooding, damaging winds up to 70 mph, large hail up to half dollar size, and a small chance of tornadoes.

Why it matters

Severe weather can pose a significant threat to public safety, infrastructure, and property in the Chicago metropolitan area. Residents need to be prepared to take shelter and heed any warnings or advisories issued by local authorities.

The details

The flood watch covers portions of Illinois including Boone, central Cook, DeKalb, eastern Will, Kane, Kendall, Lake, McHenry, northern Cook, northern Will, Ogle, southern Cook, southern Will, Winnebago counties, as well as northwest Indiana. Officials caution that creeks and streams may rise out of their banks, especially in areas with poor drainage, and roads and streets may flood due to multiple rounds of showers and thunderstorms expected through Wednesday evening.

  • The flood watch is in effect through late Wednesday night.
  • Waves of thunderstorms are expected Wednesday morning through the night hours, with some storms potentially becoming strong to severe in the afternoon and evening.

The players

National Weather Service

The federal agency responsible for weather forecasting and issuing weather-related warnings and advisories.

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What they’re saying

“Because of elevated soil moisture due to recent rainfall, flash flooding is possible.”

— National Weather Service officials

What’s next

Residents in the affected areas should monitor the weather closely and be prepared to take shelter if severe storms develop. Local authorities may issue additional warnings or advisories as the situation evolves.

The takeaway

This severe weather event highlights the importance of being prepared for sudden changes in weather conditions, especially in a major metropolitan area like Chicago. Residents should stay informed, heed any warnings, and take appropriate safety precautions to protect themselves and their property.