Associated Press The National Weather Service reported that International Falls and Hibbing set record low temperatures on Wednesday morning.
International Falls — the self-proclaimed "Nation's Icebox" — plunged to 37 degrees below zero, breaking the record of 32 below set in 1924.
Hibbing bottomed out at 28 below, breaking the record of 27 below set in 1964.
Freezing temperatures and below-zero wind chills will stay put for days to come across much of the northern United States.
Forecasters are warning of hypothermia and frostbite from arctic air settling in over the central U.S. and spreading east.