Tens of millions of people are in the path of a major winter storm. Federal cuts threaten efforts to understand the causes of such weather.

Add Yahoo as a preferred source to see more of our stories on Google. Much of the country will be hit with extreme low temperatures over the next week as a polar vortex sends cold air down from the ...

A shift in the polar vortex has forecasters watching closely as the coldest air of the season approaches. Here's what to know ...

A severe winter storm that brought crippling freezing rain, sleet and snow to a large part of the U.S. in late January 2026 ...