Major cities across the Northeast and Midwest are facing temperatures 10-20 degrees below average, according to forecasters.

A new blast of Arctic air sweeping from north to south will bring bone-chilling temperatures to millions of Americans this ...

Michigan is set for several days of frigid temperatures and heavy lake-effect snow as Arctic air continues its slow march across the eastern U.S.

A fierce Arctic blast of bitterly cold air is poised to overtake much of the central, eastern and southern U.S. over the next ...

As the polar vortex begins to stir, subtle clues point to the coming seasonal shift. So, when will freezing temperatures ...