Severe weather brought widespread power outages and disrupted travel across the Chicago area and northwestern Indiana on Tuesday.
Extreme wind gusts were reported across the region, with numerous personal weather stations recording speeds of 80 mph or higher, leading to downed trees. Tornado warning sirens sounded in both Illinois and Indiana. By late morning, all flights were suspended at Chicago's two major airports.
More than 575,000 customers lost electricity in Illinois and Indiana, according to poweroutage.us, with Lake County, Indiana, experiencing particularly severe impacts.
The National Weather Service described the storms as "dangerous."