Polar Vortex's Breathtaking Chill Freezes Millions
Commuters make a sub-zero trek to offices in the Loop on January 6, 2014 in Chicago, Illinois. Temperatures in the city dipped to -16 degree Fahrenheit this morning on the heals of a polar vortex.
( Scott Olson / Getty )
( Scott Olson / Getty )
Produced by Jillian Weinberger
