Three birds perch on a tree branch covered by glazed ice after a freezing rain in Kiev, capital of Ukraine, Dec. 11, 2020. (Photo by Sergey Starostenko/Xinhua)

A bird perches on a tree branch covered by glazed ice after a freezing rain in Kiev, capital of Ukraine, Dec. 11, 2020. (Photo by Sergey Starostenko/Xinhua)

A couple hold each other's hands as they cross a street slippery after a freezing rain in Kiev, capital of Ukraine, Dec. 11, 2020. (Photo by Sergey Starostenko/Xinhua)

Photo taken on Dec. 11, 2020 shows fallen leaves covered by glazed ice after a freezing rain in Kiev, capital of Ukraine. (Photo by Sergey Starostenko/Xinhua)

Photo taken on Dec. 11, 2020 shows a view of the downtown area of Kiev, capital of Ukraine after a freezing rain. (Photo by Sergey Starostenko/Xinhua)