CHICAGO -- A powerful winter storm is dumping heavy snow across the upper Midwest, closing major highways in several states and canceling more than 1,600 flights in Chicago. The heavy snow collapsed the roof of the Minnesota Vikings' stadium.
At least four weather-related deaths have been reported as the storm system dropped nearly 2 feet of snow in parts of Minnesota and moved east. The National Weather Service says blizzard warnings are in effect for parts of eastern Iowa, southeastern Wisconsin, northwestern Illinois and northern Michigan.
No one was hurt when the inflatable top of the Metrodome in Minneapolis collapsed but the Minnesota Vikings' game against the New York Giants has been moved to Detroit's Ford Field on Monday.