Polar vortex to send bitter cold to U.S. including DC area

However, a deep freeze, thanks to the polar vortex dipping down from Siberia, is about to bring even harsher arctic blast to ...
Some areas of the U.S. may see temperatures as low as -20 or -30 degrees early next week as arctic air from Siberia rolls in.
The most unusually cold air in the Northern Hemisphere will be over the United States early next week, bringing dangerously ...
A blast of Arctic air is set to cover much of the United States with temperatures below freezing starting on Friday and into ...
Americans were bracing Thursday for frigid temperatures that forecasters said could produce life-threatening conditions, with ...
People living "basically anywhere from the Rockies eastward" will see extremely cold temperatures over the next several days, ...
Americans face dangerously cold temperatures as a polar vortex brings life-threatening conditions. Nighttime lows may drop to ...