A pedestrian walks in the snow in Milan, Italy, on Dec. 28, 2020. A snowfall hit Milan on Monday. (Photo by Daniele Mascolo/Xinhua)

A train runs in the snow in Milan, Italy, on Dec. 28, 2020. A snowfall hit Milan on Monday. (Photo by Daniele Mascolo/Xinhua)

A train runs in the snow in Milan, Italy, on Dec. 28, 2020. A snowfall hit Milan on Monday. (Photo by Daniele Mascolo/Xinhua)

A woman walks a dog in the snow in Milan, Italy, on Dec. 28, 2020. A snowfall hit Milan on Monday. (Photo by Daniele Mascolo/Xinhua)

A man walks in the snow in Milan, northern Italy, on Dec. 28, 2020. A snowfall hit Milan on Monday. (Photo by Daniele Mascolo/Xinhua)