Us Record Breaking Cold

Millions of people across the Midwest are enduring a freeze normally reserved for the Arctic Circle as temperatures in some areas dropped below minus-50 degrees Thursday. The second day of frightful cold, bottoming out to record lows, was blamed for several deaths across the region, and fears grew for the most vulnerable populations.

The blast of Arctic air that brought record-breaking cold and caused at least a dozen deaths in the U.S. Midwest spread eastward on Thursday, bringing sub-zero misery to the Northeast.

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.

A dangerous cold snap seized the northeastern United States on Saturday with temperatures in some areas set to fall below zero and Boston facing its coldest Valentine's Day in almost four decades.

Millions of people across the Midwest are enduring a freeze normally reserved for the Arctic Circle as temperatures in some areas dropped below minus-50 degrees Thursday. The second day of frightful cold, bottoming out to record lows, was blamed for several deaths across the region, and fears grew for the most vulnerable populations.

The blast of Arctic air that brought record-breaking cold and caused at least a dozen deaths in the U.S. Midwest spread eastward on Thursday, bringing sub-zero misery to the Northeast.

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.

A dangerous cold snap seized the northeastern United States on Saturday with temperatures in some areas set to fall below zero and Boston facing its coldest Valentine's Day in almost four decades.