The polar vortex’s icy grip on much of America has Arctic Greenland seeming like a toasty vacation spot by comparison.

"An Arctic air mass is expected to plunge into the Central U.S. this week, with high confidence for widespread, ...

Another arctic blast has sent temperatures plummeting across the United States, bringing “life-threatening” wind chills and ...

The National Weather Service has issued extreme cold warnings for millions of Americans from the Canadian border to Texas.

The polar vortex is not synonymous with cold snaps, but when it slides toward the United States, the polar jet stream can ...

The polar vortex, as explained by the National Weather Service, is a large area of low pressure and cold air that encircles ...

The polar vortex has returned to the U.S., and frostbite-inducing temperatures are blasting millions of Americans.

More than 95 million people are facing gripping cold Tuesday as a polar vortex sends temperatures plunging to record levels, ...

The frigid stream of air that plunged down into the Central U.S. this week is breaking cold records from South Dakota to Texas, with temperatures in the single digits setting records in many ...

Harsh weather moved west as a polar vortex was expected to grip the Rockies and the northern Plains after winter storms pummeled the eastern U.S. over the weekend, killing at least 10 people, includin ...

The polar vortex is coming back. After a half-month hiatus, frigid air will again surge across the United States beginning this weekend through next week, as the unusually cold blob of air dips ...

“It’s the depths of winter. Everything signals extreme biting, winter cold. Obviously this isn’t the first polar vortex episode of the winter, but it looks to be the most severe.” A ...