A polar vortex collapse could bring extreme cold and travel disruptions to North America and Europe in mid-March. Newsweek's live blog is closed.

A lobe of the polar vortex, a ring of freezing air typically found near the North Pole, will once again move into the central and eastern states this week, bringing some of the coldest air of the ...

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

It’s really, really cold again — as the US shivers through at least the eighth blast of air from the Arctic this winter. Winter, which is warming faster than any other season for much of the ...

Scientists say it’s being caused by a misbehaving polar vortex combining with a key weather pattern that seems to be stuck in place. Some scientists say these factors and this winter could be ...