However, a deep freeze, thanks to the polar vortex dipping down from Siberia, is about to bring even harsher arctic blast to nearly 300 million Americans starting this weekend. Maps show where and when the cold front will arrive.

Arctic winds from a powerful polar vortex are sweeping across several ... to the east coast—including major cities such as Washington, D.C., and Philadelphia—are under weather alerts.

People living "basically anywhere from the Rockies eastward" will see extremely cold temperatures over the next several days, a meteorologist says. That includes Kansas City, which is set to host a Chiefs playoffs game this weekend.

A huge swath of the U.S. was blasted with ice, snow and wind on Monday as the polar vortex that dipped ... wardrobes for hats and gloves. Washington, D.C., received heavy snow as President-elect ...

with forecasts calling for the dreaded combo to spread eastward toward Washington, D.C. in the coming days. The polar vortex of ultra-cold air usually stays penned up around the North Pole, spinning like a top. But sometimes it escapes or stretches down to ...

A huge swath of the U.S. was blasted with ice, snow and wind on Monday as the polar vortex that dipped ... for warm hats and gloves. Washington, D.C., received heavy snow as President-elect ...

A huge swath of the U.S. was blasted with ice, snow and wind on Monday as the polar vortex that dipped ... for warm hats and gloves. Washington, D.C., received heavy snow as President-elect ...

Donald Trump, 78, will be sworn in as the 47th president of the United States on Monday, with the ceremony moved indoors to the Capitol Rotunda due to an impending polar vortex. Th

President-elect Donald Trump will take the oath of office indoors due to the freezing temperatures expected during his inaugural ceremonies.

With temperatures expected to be among the coldest Inauguration Day in decades, officials have decided to move the swearing-in ceremony inside.

Frigid arctic air due to a polar vortex is about to send temperatures plunging for millions of Americans across the U.S., and that could lead to one of the coldest Inauguration Days seen in decades.