World News | Katie Mettler, Christopher Ingraham, Samantha Schmidt, Angela Fritz, The Washington Post | Wednesday January 30, 2019
Polar vortex: Nearly 90 million people are likely to experience temperatures at or below zero in the Midwest and New England, according to the National Weather Service; 25 million of them will face temperatures below minus-20 - dips that when combined with wind can cause frostbite in a matter of minutes.
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