A round of frigid temperatures is sweeping across much of the United States this week, bringing dangerously cold conditions ...

Many of the states were experiencing life-threatening cold on Wednesday, but a "dramatic" shift is expected this weekend.

Days of dangerously cold conditions Last weekend, temperatures fell to the -50s in the northern parts of the Prairie ...

An intense blast of cold air has taken up shop in the central United States this week with temperatures up to 50 degrees ...

Temperatures in Boulder, Colorado, skyrocketed by almost 30 degrees in only one hour on Wednesday because of a phenomenon called Chinook winds. Here's how that works.