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

However, a deep freeze, thanks to the polar vortex dipping down from Siberia, is bringing an even harsher arctic blast to million Americans this week. Maps show what to expect as the cold front ...

And if the polar vortex is to blame. First, a quick refresher on the polar vortex. The polar vortex is a region of very strong winds that form a circle around the North Pole. The vortex is located ...

Under the Rotunda of the U.S. Capitol, Donald Trump was again inaugurated, this time as the 47th president of the United ...

The polar vortex is expected to reach the Utah-Idaho ... night to help keep heat and recommends against using any portable space heaters and limiting appliances like ovens, dishwashers and clothes ...

A polar vortex could cause light snow over the weekend in Knoxville. A polar vortex is to blame for freezing temperatures.