Research has found that rising temperatures in the Arctic are weakening weather systems that normally trap the cold around ...

The dangerous wind chills and severe levels of ... for widespread frigid conditions that will rival the notorious polar vortex episode of winter 2014. During January 2014, more than 140 million ...

Dangerous temperatures are sweeping the country, with 100 million people from the Plains to the Northeast feeling the chill. Even those in the South will see some effects. Several cities have already ...

A dangerous and potentially life-threatening stretch of cold weather has much of the U.S. on alert as a lobe of the polar vortex invades the nation and sends temperatures tumbling to levels not seen ...

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the South.

The polar vortex that has brought dangerously cold weather is projected to stick around through Tuesday. This means ...

Like much of the U.S., Wisconsinites woke up Tuesday morning to bitter cold conditions. Many schools and colleges throughout the Milwaukee area closed as the area braced for the dangerous freezing ...

Historic winter storm shatters records across the South, leaving millions grappling with extreme cold and unprecedented ...

A mass of cold air from the Arctic – known as a polar vortex - is what’s chilling Quebec, including Montreal, until Wednesday ...