Heavy Storms Bring Flooding Concerns Across Illinois

Lake County officials warn of rising river levels and flooded roadways after overnight rainfall.

Apr. 18, 2026 at 4:50pm

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A vast, atmospheric landscape painting depicting a flooded rural area, with a distant farmhouse or structure partially obscured by the expansive, turbulent floodwaters that dominate the scene, conveying the overwhelming scale and power of the natural disaster.Floodwaters from heavy storms overwhelm the rural Illinois landscape, underscoring the region's vulnerability to the growing threat of extreme weather.Chicago Today

Many areas across Illinois are dealing with flooding threats after storms on Friday night brought heavy rainfall, leaving many Lake County roadways flooded on Saturday. Lake County officials are warning of flooding impacts along the Des Plaines River and Fox River after nearly two inches of rainfall, with the North Branch Chicago River and Lake Michigan waterways also impacted by higher water levels.

Why it matters

Flooding is a major concern in Illinois, especially in low-lying areas near rivers and lakes. Heavy rainfall can quickly overwhelm drainage systems and lead to dangerous conditions for residents. Local officials are closely monitoring the situation and providing safety guidance to help protect communities.

The details

Rain left many Lake County roadways flooded on Saturday. Lake County officials are warning of flooding impacts along the Des Plaines River and Fox River after a reported nearly two inches of rainfall across the area. The rainfall overnight added to the flooding caused by rain this past week. Flooding was reported along the Des Plaines River, including south of Townline Road and in the Gurnee area. Officials said the North Branch Chicago River and Lake Michigan waterways were also impacted with higher water levels, but have started to recede.

  • The storms occurred on Friday night, April 17, 2026.
  • Lake County officials are warning of flooding impacts on Saturday, April 18, 2026 and into Sunday, April 19, 2026.

The players

Lake County

A county in northeastern Illinois that is dealing with the flooding impacts from the heavy rainfall.

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What’s next

Lake County officials have released flooding safety tips for residents and are closely monitoring water levels along the rivers and waterways, which are expected to peak between Saturday and Sunday before gradually receding.

The takeaway

This flooding event highlights the importance of preparedness and quick response from local authorities to protect communities from the dangers of heavy rainfall and rising water levels. Residents should heed all safety warnings and guidance from officials during these types of severe weather situations.