You might have heard the term “polar vortex” thrown around during the winter months, but what does it really mean and how ...

The polar vortex has returned to the U.S., and frostbite-inducing temperatures are blasting millions of Americans.

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

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 ... central and southern Florida exempted ...

The polar vortex has returned to the U.s., and frostbite-inducing temperatures are blasting millions of Americans. According to the FOX Forecast Center, arctic air is descending and spreading ...