The week began with a biting cold snap that hammered much of the U.S., the product of a jet stream that slips out of its usual path more often these days.

The 2017 Thomas Fire, one of the largest fires in state history, was sparked by Southern California Edison power lines that came into contact during high wind, investigators determined. The blaze killed two people and charred more than 440 square miles (1,140 square kilometers).

But during the winter, it is joined by a second atmospheric phenomenon dubbed the polar vortex. This swirl of frigid air, located more than 10 miles above Earth’s surface, strengthens each year ...

One of the key players in these dramatic shifts is something called the polar vortex. The polar vortex is a massive area of cold air located high in the atmosphere, typically spinning over the ...

What’s shaping up to be the most expansive polar vortex in over a decade is about to plunge much of North America, including nearly all of Canada, into the coldest temperatures the country has ...

These outbreaks can happen when the polar vortex is in a weaker state, allowing cold air that is normally confined to the north to break off and move further south. Some experts say this is ...

It looks like it could get even colder heading into next week. Within the last decade, the phrase 'polar vortex' has become popularized in the weather world. In fact, you may have heard it getting ...

That will solve this once and for all,” Will Duffy said. “We need to go to Antarctica. I need to take a flat-Earther or two with me and see the 24-hour sun and then this whole thing is

It was a week of fire and ice. It began with millions of people across the U.S. shivering amid blizzard conditions and frigid air that lasted for days, thanks to a jet stream that slips out of its usual path more often these days.

The late Muhammad Ali ‘s wife is set to honor his legacy with a new audio series, featuring a lineup of special guests that include popular figures from Will Smith to Mike

Devastating blazes have scattered thousands of crewmembers, raising fears of a quickened migration of projects away from California.

Actress and musician Zooey Deschanel, best known for her roles in "New Girl," "500 Days of Summer" and "Trolls," and for She & Him, her band with M. Ward, turns 45 on Friday. Here's a look back at her career through the years.