Severe Overnight Storms Bring Flooding, Wind Damage, and Tornado to Chicago Area
Severe Overnight Storms Bring Flooding, Wind Damage, and Tornado to Chicago Area
US · Published Aug 11, 2026
The Chicago area experienced intense overnight storms from Sunday into Monday, bringing heavy rain, flooding, and wind damage. A confirmed EF-1 tornado touched down in southeastern LaSalle County at 11:44 p.m. Sunday, approximately five miles west of Ransom. Radar detected debris along North 17th Road, though damage reports were limited to farmhouses and a freight train. In Chicago neighborhoods like Avondale and Andersonville, heavy rain caused road ponding, and strong winds snapped tree limbs, damaging vehicles. Earlier storms on Sunday also caused flooding and power outages, with ComEd reporting over 4,600 customers affected as of Monday morning. Flight cancellations at O'Hare International Airport reached
The severe weather pattern is expected to persist throughout the week, with additional storms forecasted later Monday.

Impact & Risks

The storms have caused significant disruptions, including flooded roads, downed trees, and power outages. Motorists faced hazardous conditions, particularly in areas like the Edens Expressway and Stevenson Expressway. The EF-1 tornado in LaSalle County posed risks to rural communities, damaging farms and overturning a freight train. In suburban areas like Mundelein and Arlington Heights, flooding and fallen tree limbs blocked streets and required emergency rescues. The ongoing severe weather pattern increases the likelihood of further disruptions, including additional flooding and power outages.

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