MINNEAPOLIS (AP) Students were staying home from school and several businesses were closed in the upper Midwest as arctic air pushed wind chill readings to more than 40 below zero in some areas.
A wind chill warning was in effect Thursday for northeastern North Dakota and northern Minnesota.
Forecasters were warning people to bundle up because exposed skin could suffer frostbite in as little as 10 minutes.
At least one death could be related to the cold.
Omaha police say the body of an 80-year-old man was found early Thursday near an assisted-living home.
Police say he wasn't dressed for the weather, as the wind chill was minus 26 degrees.