美国遭新一轮暴风雪吹袭 遇难者增至21人(组图)

　　Clean-up: In Danville, Kentucky, a city worker shovels snow off the roof after the devastating cold snap

　　Struggling on: A wrapped-up figure makes their way through the snow in Philadelphia after an NHL game Saturday

　　Widespread chill: IN Denver, Colorado, this commuter took to the streets on cross-country skis on Saturday

　　NWS warned that 'structural collapses' are possible for rooftops overloaded with the persistent snowfall. Maryland State Police said people had abandoned their vehicles along interstates and roadways.

　　Fun for some: Ella Gregg, six, and her three-year-old sister Olivia made the most of the snow on a hill in Dublin, Ohio

　　Chillout: The Broadway Bridge in the Bronx borough of New York City was pounded by snow Saturday night

　　Brave: Hardy souls took to the waters in Newport, Vermont, for the U.S. Winter Swimming Championships

　　Cold stroke: Jonathan Gladstone (left) of the USA and Yuta Tsuboi (right) of Japan compete in the frosty waters at Lake Memphremagog

　　Snow art: William Green, 25, spray paints flowers onto a snow bank in the parking lot of Genrichís Garden Center where he works in Irondequoit, New York