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

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 ...

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 ...

Erin Davis/Axios Visuals An invasion of frigid air from the Arctic is sweeping south from the Plains and Ohio Valley Sunday, moving towards the Southeast and East. Threat level: The ...

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

BALTIMORE, MD — Two rounds of snow are forecast in the coming days before part of the polar vortex dips into the Lower 48 states, bringing bitter and dangerously cold temperatures to Maryland.

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 ...

Extreme cold and snow smacked the Gulf Coast states this week, but the polar vortex may not be to blame.

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