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  • Kwang-ki Lee of South Korea competes in the final round of the of the FIS Snowboard World Cup 2017 Men's Snowboard Halfpipe during the Toyota U.S. Grand Prix at Mammoth Mountain, Feb. 5, 2017, in Mammoth, California.
    Sean M. Haffey/Getty Images
  • An aerial view of a winter landscape, Jan. 17, 2017, near Treplin, Germany.
    Patrick Pleul/AFP/Getty Images
  • A snow sculpture in the shape of the Olympic rings, Feb. 4, 2017, in the town of Hoenggye, near the venue for the opening and closing ceremonies for the upcoming Pyeongchang 2018 Winter Olympic Games.
    Jung Yeon-Je/AFP/Getty Images
  • A team of Quebec police compete during the ice canoe race at the Quebec Winter Carnival in Quebec City, Feb. 5, 2017.
    Mathieu Belanger/Reuters
  • An aerial view of a winter landscape, Jan. 17, 2017, near Treplin, Germany.
    Patrick Pleul/AFP/Getty Images
  • A lonely tree on a meadow covered in snow during frosty temperatures near Wolfratshausen, Germany, Jan. 25, 2017.
    Sven Hoppe/dpa Photo via Newscom
  • People ice skate on the frozen lake Lac de Joux during a period of cold weather, in Le Pont, Switzerland, Jan. 22, 2017.
    Laurent Gillierson/EPA
  • People walk past a frozen public fountain during cold winter weather in Zurich, Switzerland, on Jan. 27, 2017.
    Arnd Wiegmann/Reuters
  • A small boat stands surrounded by ice covered Danube river on a cold winter day in Belgrade, Serbia, on Jan. 27, 2017.
    Predrag Milosavljevic/Newscom
  • Morning light on ice, on Jan. 25, 2017, in Hanburg, Germany.
  • A woman visits the building that imitates a greco-roman temple which was built in 1869 on the summit of the Donon mountain, in Granfontaine, near Strasbourg, France, Jan. 19, 2017.
    Christian Hartmann/Reuters
  • Snow falls as people commute by tram in central Budapest, Hungary, Jan. 13, 2017.
    Zoltan Balogh/EPA
  • Snow covers snow guns at the Zauchensee ski resort, Austria, Jan. 12, 2017.
    Christian Bruna/EPA
  • Icicles hang from the roof of a house in Winterberg, Germany, Jan. 13, 2017.
    Caroline Seidel/AFP/Getty Images
  • A plow clears a playground in lower Manhattan, photographed from New York's One World Trade Center building, Jan. 9, 2017.
    Richard Drew/AP Photo
  • Snow falls in Bowling Green, Kentucky, Jan. 5, 2017. School districts in Kentucky, Tennessee and West Virginia either closed or called off classes as early as snow began falling and more cancellations were planned Friday, including by school systems in central Alabama amid the threat of up to 3 inches of snow and sleet.
    Austin Anthony/Daily News via AP Photo
  • The walls of nearby buildings are reflected in a partially frozen fountain, Jan. 4, 2017, in Tacoma, Washington. Wet winter weather slammed much of the West on Wednesday, with storms dropping several inches of snow on one Oregon city and several feet of the white stuff predicted high in the Sierra Nevada.
    Ted S. Warren/AP Photo
  • A person walks through a heavy snowfall during a day of winter weather in Berlin, Jan. 5, 2017.
    Markus Schreiber/AP Photo
  • After several days of extremely low temperatures, a frozen Lake Michigan, off Lake Shore Drive in Chicago, is seen on the day of the winter solstice, Dec. 21, 2016.
    Stephen Chung/LNP/REX/Shutterstock
  • A pedestrian makes his way across an icy Willamette Street in Eugene, Oregon, Jan. 5, 2017, after a snow storm dumped several inches of snow on the area.
    Chris Pietsch/The Register-Guard via AP Photo
  • A winter swim lover throws hot water into cold air in Heihe, Heilongjiang province, China, Dec. 27, 2016.
  • A man and his dog look for places to place ice fishing traps on Pushaw Lake in Orono, Maine, Dec. 30, 2016.
    Ashley Conti/Reuters
  • A wooden cottage is covered in snow in the Talesh mountains, close to the Caspian Sea, some 262 miles northeast of Tehran, Iran, Dec. 20, 2016. Villagers leave their wooden cottages in cold seasons due to heavy snowfall, returning in late spring to host tourists.
    Ebrahim Noroozi/AP Photo
  • A boy skis along a street near Montreal, Dec. 24, 2016.
    Graham Hughes/The Canadian Press via AP
  • A horse nibbles on some hay laid out on a snow-covered field near Unterjoch, Germany, Dec. 19, 2016.
    Karl-Josef Hildenbrand/EPA
  • Youngsters slide down a hill at Chapman Elementary School in Portland, Oregon, Dec. 15, 2016.
    Mike Zacchino/The Oregonian via AP Photo
  • The pre-Alpine region near Bernbeuren, southern Germany, is pictured during the sunrise on Dec. 16, 2016.
    Karl-Josef Hildenbrand/Getty Images
  • Colorful Christmas lights are seen in front of a residential house in Toronto, Canada, Dec. 22, 2016. Toronto was turned into a winter wonderland at night as people decorated their houses with tens of thousands of Christmas lights.
    Zou Zheng/Newscom
  • A window covered in frost shortly before dawn near Seeg, Germany, Nov. 29, 2016.
    Karl-Josef Hildenbrand/dpa Photo via Newscom
  • The inside of the Athabasca Glacier ice caves in Alberta, Canada, display a vivid blue color and mesmerizing patterns in the ice can be seen on the walls and roof of the cave, Nov. 15, 2016. Photographer Clara Gamito, 35, was joined by friends when she ventured inside the frozen cave.
    Solent News/REX/Shutterstock
  • 4 year old Scarlett looks into the mouth of a polar bear head ice sculpture at the launch of Hyde Park Winter Wonderland's Magical Ice Kingdom in London, Nov. 17, 2016. This year's Winter Wonderland starts on Nov. 18,2016 and until Jan. 2, 2017.
    Frank Augstein/AP Photo
  • A winter swimmer prepares for a swim in a pool dug out on the ice-covered river in Shenyang in northeast China's Liaoning province, Dec. 15, 2016.
  • Gregory Bretz takes a practice run in the halfpipe during the 2017 U.S. Snowboarding Grand Prix at Copper Mountain, on Dec. 13, 2016, in Copper Mountain, Colorado.
    Sean M. Haffey/Getty Images
  • Ukrainian children type traces on the snow in Kiev, Ukraine, on Dec. 15, 2016.
    Sergey Dolzhenko/EPA
  • The small lake in Seelisberg, canton of Uri, Central Switzerland, is seen after the fog cleared, Dec. 13, 2016.
    Urs Flueeler/EPA
  • Snow falls in the streets of New York, on Dec. 11, 2016, in New York City.
    Alba Vigaray/EPA
  • The Washington Capitol is seen at sunset as snow falls in Olympia, Washington, Dec. 8, 2016. Snow fell across the Pacific Northwest as the first winter storm of the season hit the region.
    Rachel La Corte/AP Photo
  • Icicles lengthen in freezing rain as they hang from branches on a maple tree in Eugene, Oregon, Dec. 14, 2016.
    Brian Davies/The Register-Guard via A Photo
  • A tree is covered in hoarfrost in a field shrouded in thick fog near Straubing in Bavaria, Germany, Dec. 8, 2016.
  • Trees are covered in snow at the Tbilisi National Park outside Tbilisi, Georgia, Dec. 10, 2016.
  • Snow covers vehicles in a rental car parking lot at O'Hare International Airport, Dec. 11, 2016, in Chicago. The wintry weather has forced airlines to cancel more than 1,000 flights at Midway and O'Hare airports as of late Sunday morning.
    Nam Y. Huh/AP Photo
  • Geese walk along the snow covered waterfront park through heavy snowfall as the first winter storm of the season hits the area in Portland, Oregon, Dec. 8, 2016.
    Don Ryan/AP Photo
  • Artists create a snow sculpture at a park before the annual Snow Expo starts in Harbin, capital of northeast China's Heilongjiang Province, Dec. 9, 2016.
    Wang Jianwei/Newscom
  • A young Native American man rides his horse through the snow near the Oceti Sakowin camp as "water protectors" continue to demonstrate against plans to pass the Dakota Access pipeline near the Standing Rock Indian Reservation, near Cannon Ball, North Dakota, Dec. 4, 2016.
    Lucas Jackson/Reuters
  • White frost covers a bush, lighting up in the winter sun, in Werder, Germany, Dec. 5, 2016.
    Ralf Hirschberger/Newscom
  • The tree branches are covered in snow in Asperg, Germany, Dec. 7, 2016. The weather phenomenon is caused by water steam from indsutrial premises and is thus "industrial snow", according to the German Weather Service.
    Andreas Rosar/dpa Photo via Newscom
  • Branches are covered in a layer of hoarfrost near Sieversdorf, Germany, Dec. 5, 2016.
    Patrick Pleul/dpa Photo via Newscom
  • Sheep stand in a snow-covered field in the village of Upperthong, North England, as Storm Angus, the year's first big winter storm in Britain, lashes England's south coast, Nov. 20, 2016.
    Anthony Devlin/PA via AP Photo
  • A man walks in the snow near the entrance to the St. Cloud Public Library, Nov. 18, 2016, in St. Cloud, Minnesota.
    Dave Schwarz/St. Cloud Times via AP Photo
  • Trees covered with snow in the central park of the city of Bishkek, Kyrgyzstan, Nov. 19, 2016.
    Igor Kovalenko/EPA
  • A snow-covered mountain is seen behind clouds near Balderschwang, Germany, Nov. 12, 2016.
    dpa/Karl-Josef Hildenbrand/AFP/Getty Images
  • Snow-covered leaves are lying on the ground in the city of Schulenberg, Germany, Nov. 9, 2016.
    picture alliance/Frank May/Newscom
  • A view of numerous giant ice balls on the shore of the Gulf of Ob, a bay between the Gydan and Yamal peninsulas in Russia, Nov. 11, 2016. Ranging in size from 4-10 inches and relatively regular in shape, the ice balls form as snow slush and pieces of shore-fast ice are washed by waves.
    Alexei Chikotilov/TASS/Newscom
  • An aerial shot in Orton Scar Cumbria in the U.K., Nov. 18, 2016.
  • The skiing tracks are covered in snow on Wurmberg mountain, Germany, Nov. 14, 2016.
    Stefan Ranpfel/dpa/picture-alliance/Newscom
  • Snow covers roses in Ostafyevo Park during the autumn snowfall in Moscow, Russia, Oct. 29, 2016.
    Maxim Shipenkov/EPA
  • A tree which still carries its autumnal colored leaves is covered in a layer of snow on a meadow near Wolfratshausen, Germany, following snowfalls in the German Bavaria state, Nov. 6, 2016.
    Sven Hoppe/EPA