President-elect Donald Trump's second inauguration will mark the coldest presidential ceremony in more than 40 years.

Some areas of the U.S. may see temperatures as low as -20 or -30 degrees early next week as arctic air from Siberia rolls in.

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

WASHINGTON — Get ready for extreme cold weather in D.C. and most of the U.S. over the next few days. The polar vortex has ...

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

A lobe of the polar vortex will arrive in the United States this weekend, bringing the lowest temperatures in years and snow ...

The coldest weather of the season to date will be due to a phenomenon called a polar vortex, an upper-level jet stream that ...

A polar vortex is slated to sweep most of the continental US bringing winter storm warnings and a hazardous freeze to ...

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

Americans were bracing Thursday for frigid temperatures that forecasters said could produce life-threatening conditions, with ...

A rare winter storm is getting set to slam the Gulf Coast and South, with cities from Texas to Florida under Winter Storm Warnings.