A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of the arctic blast.

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 ...

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

With last week's freeze being the second time temperatures dipped below freezing this winter, many are wondering if this ...

A polar vortex is forecasted to blanket most of the continental United States in the coming week, with parts of the Deep South expected to see freezing temperatures. Nearly 300 million Americans are ...

A major cold blast is in store for more than 30 states as a widespread arctic air outbreak will send nearly every American east of the Rockies into a deep freeze. This will be due to a polar vortex, ...

A polar vortex will plunge Waterloo region, Guelph and Wellington County into a deep freeze until Wednesday, Environment Canada says. On Monday morning, the federal weather agency issued an ...