Snow covered trees in Chicago amid the cold front that brought minus 25 degree temperatures. Meteorologists blamed a phenomenon called the polar vortex for the bitter cold that has descended on much of the central and eastern United States this week.(Photo/IC)
Snow covered trees in Chicago amid the cold front that brought minus 25 degree temperatures. Meteorologists blamed a phenomenon called the polar vortex for the bitter cold that has descended on much of the central and eastern United States this week.(Photo/IC)
Snow covered trees in Chicago amid the cold front that brought minus 25 degree temperatures. Meteorologists blamed a phenomenon called the polar vortex for the bitter cold that has descended on much of the central and eastern United States this week.(Photo/IC)
