Major cities across the Northeast and Midwest are facing temperatures 10-20 degrees below average, according to forecasters.
Morning Overview on MSN
Polar vortex map reveals which states are about to freeze in Arctic air
A fresh blast of Arctic air is poised to spill across a wide swath of the United States, and the latest polar vortex map ...
A fierce Arctic blast of bitterly cold air is poised to overtake much of the central, eastern and southern U.S. over the next ...
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