A polar vortex collapse is an event that occurs when the layer between 10km and 50km above Earth’s surface warms up to 50 ...

Dangerously cold temperatures were descending into the U.S. as far south as Texas on Tuesday, breaking records in some areas.

An Arctic air mass kept its grip on much of the central and eastern U.S. on Friday, plunging temperatures to record lows as snow blanketed central Colorado and the Pacific Northwest braced for an ...

Nineteen states from Nebraska to Florida are facing cold weather alerts on Friday morning as a relentless Arctic blast persists ... fourth morning in a row of record-low temperatures across ...

A bitter blast of Arctic air is roaring south across the central U.S. Tuesday, bringing with it record cold temperatures and "dangerously" low wind chills.

An Arctic air mass kept its grip on much of the central and eastern U.S. on Friday, plunging temperatures to record lows as snow blanketed central Colorado and the Pacific Northwest braced for an ...

The Arctic blast has broken dozens of decades-old records across the country this week. On Thursday, low temperatures in Midland, Texas, reached 14 degrees, smashing the previous record of 19 ...