Alerts for cold weather are in effect for nearly half of the U.S. population, running from the northern Plains to the Gulf ...

T​he season's most drastic drop in temperatures is now plowing through the central and eastern states with dangerous wind ...

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

However, a deep freeze, thanks to the polar vortex dipping down from Siberia, is about to bring even harsher arctic blast to ...

Extreme cold could expose residents of several states to conditions like hypothermia and frostbite over the weekend.

The coldest air of the season will descend across the U.S. this weekend and early next week, bringing subzero wind chills ...

Heavy snow, ice, rain and severe thunderstorms will be unleashed from the Plains to the East Coast. While snow and ice has been limited to the northern states this winter, the upcoming storm will ...

The heaviest snowfall in a decade is on its way to Kansas and Missouri, part of a major winter storm stretching 1,300 miles ...

The first significant winter storm of the year is endangering a 2,100-mile swath of the country from the Northwest and Plains through the mid-Atlantic and East Coast, bringing a multitude of life-thre ...

A light, 4.7-magnitude earthquake struck in Northern California on Wednesday, according to the United States Geological Survey ... to update the shake-severity map. Aftershocks can occur days ...