Polar Vortex Brings Extreme Cold Temperatures To Chicago

CHICAGO, ILLINOIS - JANUARY 31: A man walks along an ice-covered break-wall along Lake Michigan while temperatures were hovering around -20 degrees and wind chills nearing -50 degrees on January 31, 2019 in Chicago, Illinois. Businesses and schools have closed, Amtrak has suspended service into the city, more than a thousand flights have been cancelled and mail delivery has been suspended as the city copes with record-setting low temperatures. (Photo by Scott Olson/Getty Images)