A powerful, gusty storm is dumping mounds of snow across the upper Midwest.
The storm has closed major highways in several states, canceled more than 1,400 flights in Chicago and collapsed the roof of the Minnesota Vikings' stadium.
At least two weather-related deaths were reported as the storm system dropped nearly 2 feet of snow in parts of Minnesota and marched east. A blizzard warning is in effect for parts of eastern Iowa, southeastern Wisconsin, northwestern Illinois and northern Michigan. Surrounding areas, including Chicago, are under winter storm warnings. Much of Iowa is under a wind-chill advisory.
The wintry weather, with blowing snow that severely limits visibility, has wreaked havoc on air and road travel.
More than 1,200 flights have been canceled at O'Hare International Airport and more than 250 at Midway International Airport. Both airports expect more cancellations and report significant delays.