Wind blows snow on top of Engstligenalp near Adelboden, Switzerland January 12, 2019.
A street sign is covered in snow in Oberjoch, Germany, January 15, 2019.
A frost covered Wendelstein church, Germany's highest church, on the 1838 metres (6030 feet) high Wendelstein mountain is seen near Bayrischzell, Germany, January 23 , 2019.
A house is covered by snow at the mountain resort in Szczyrk, Poland January 7, 2019.
Snow covers the roofs of the so-called "Alter Flecken" (old spot), the historic core of downtown Freudenberg with its half-timbered houses from the 17th century in the heart of the federal state of North Rhine-Westphalia near the city of Siegen, Germany, December 16, 2018.
Deers are seen in the snow-covered landscape near Klosters, Switzerland January 15 2019.
The snow-covered landscape is seen near Menzingen, Switzerland February 5, 2019.
A woman tries to catch snowflakes with her tongue during a snowfall on Chandragiri Hills in Kathmandu, Nepal January 23, 2019.
A child stands near the Peace Bell at the Fichtelberg in the Ore Mountains in Oberwiesenthal, Germany, January 25, 2019.
A person cycles over the Clifton Suspension Bridge and Avon Gorge in Bristol during snowfall in southwest Britain, February 1, 2019.
A deer is seen on Mount Parnitha during snowfall, near Athens, Greece, January 4, 2019.
Trees are covered with snow in Oberjoch, Germany, January 15, 2019.
A pedestrian stops to take a photo by Chicago River, as bitter cold phenomenon called the polar vortex has descended on much of the central and eastern United States, in Chicago, Illinois, U.S., January 29, 2019.
A dog is seen in a snow covered park during snowfall in Kiev, Ukraine February 6, 2019.
Winter outdoor sports enthusiast Olesya Ushakova poses in front of her acquaintance (not pictured) while throwing hot water into subzero air as she participates in the "Dubak Challenge", a social media trend translating to an intense cold challenge that is recently popular in Russia, during sunset outside the Siberian city of Krasnoyarsk, Russia February 8, 2019. REUTERS/Ilya Naymushin
A dog enjoys playing in the snow on the Feldberg mountain near Koenigstein, 20 km outside of Frankfurt, Germany, January 22, 2019.
Water flows around ice, formed on the American Falls in Niagara Falls, New York, due to subzero temperatures, viewed from the Canadian side, in Niagara Falls, Ontario, Canada, January 22, 2019.
Trees are covered with snow in Hohenleiten, near Munich, Germany, January 6, 2019.
A man shovels snow on a rooftop during heavy snowfall in Filzmoos, Austria January 8, 2019. REUTERS/Leonhard Foeger - RC1EEF05DE30
Members of the Dolphin winter swimming club swim in the icy waters of the Yenisei River during their weekly bathing session, with the air temperature at about minus 28 degrees Celsius (18.4 degrees Fahrenheit), in the Siberian town of Divnogorsk, Russia February 8, 2019.
People stand in front of a snow-covered forest in Oberwiesenthal, Germany, January 24, 2019.
Trees covered with snow are seen after sunset at the mountain resort in Szczyrk, Poland January 7, 2019.
A pied wagtail bird walks through footprints on snow in Glenshane Pass, Northern Ireland, January 22, 2019.