A round of frigid temperatures is sweeping across much of the United States this week, bringing dangerously cold conditions to millions and setting the stage for widespread disruptions.

At the Dakota Zoo in Bismarck, which closed last weekend due to cold, critters such as bison, elk and bighorn sheep don't mind the temperatures as they munch food to stay warm and

Harsh weather moved west on Monday 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,

A deadly coast-to-coast winter storm sweeping across the United States this weekend continues to threaten parts of the South, Midwest and Northeast with more flooding, widespread strong winds, and heavy snow.