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Thunderstorms snarl traffic at Chicago airports

Hundreds of flights have been canceled at Chicago’s O’Hare International Airport due to thunderstorms.

The severe weather has led to more than 500 cancellation at O’Hare and more than 30 cancellations at nearby Midway International, Chicago Department of Aviation spokesperson Gregg Cunningham told NBC News.

Strong storms and wind are expected in the region throughout Thursday. Delays for some flights heading into O’Hare average more than five hours, according to the Federal Aviation Administration.

“It appears airlines will continue to proactively cancel fights” throughout the day, Cunningham said.

More than 4 1/2 inches of rain pounded O'Hare over the past 24 hours, and water was seen coming through the roof at Terminal 3, according to NBC Chicago.

Travelers should check with their airlines or check their flight status online before heading to the airport, he said.