Every state but Hawaii, California and Florida is likely to get a taste of wind chills of 20 degrees or colder.

After a winter storm this weekend, the polar vortex will return, bringing subzero temperatures to around 80 million people ...

The coldest burst of Arctic air this season is coming to put an icy exclamation point on America's winter of repeated polar vortex invasions, meteorologists warn. And it will stay frozen there all ...