This week, temperatures in Chicago dipped to -16 degree Fahrenheit (-26.7 degree Celsius) on the heals of the frigid, dense air known as a polar vortex , which has swept across the Midwest and through huge portion of the United States.
This week, temperatures in Chicago dipped to -16 degree Fahrenheit (-26.7 degree Celsius) on the heals of the frigid, dense air known as a polar vortex , which has swept across the Midwest and through huge portion of the United States.