A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of ...

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

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

Another Arctic blast has been forecast to bring frigid air to a large section of the United States later in January.

Southern California is bracing for more high fire danger as powerful Santa Ana winds return, sparking new warnings from ...