Polar Vortex Brings Extreme Cold Temperatures To Chicago

CHICAGO, ILLINOIS - JANUARY 30: Ice covers the Lake Michigan shoreline on January 30, 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)