Polar vortex brings coldest air in a generation

8:01 a.m. ET, February 1, 2019

9:44 a.m. ET, January 29, 2019

75% of the country will dip below freezing this week

The National Weather Service projects that 75% of the US population will see below-freezing temperatures at some point before Sunday.

Only parts of Florida, Texas, the Pacific coast and the Southwest appear to avoid dipping below 32 degrees:

And about 30% of Americans will bee below-zero temperatures this week: