Photo taken on Dec. 29, 2020 shows a winter storm in downtown Chicago, the United States. Morning commuters in Chicago experienced icy roads and slow traffic on Wednesday as the first major winter storm hit the city. The snow started to blanket Chicago on Tuesday afternoon and ended on early Wednesday, with lingering drizzle through 10 a.m. to noon. (Photo by Joel Lerner/Xinhua)

A sidewalk plowing crew greet a man dressed as Santa Claus during a winter storm in downtown Chicago, the United States, on Dec. 29, 2020. Morning commuters in Chicago experienced icy roads and slow traffic on Wednesday as the first major winter storm hit the city. The snow started to blanket Chicago on Tuesday afternoon and ended on early Wednesday, with lingering drizzle through 10 a.m. to noon. (Photo by Joel Lerner/Xinhua)

A cyclist waits to cross a road during a winter storm in downtown Chicago, the United States, on Dec. 29, 2020. Morning commuters in Chicago experienced icy roads and slow traffic on Wednesday as the first major winter storm hit the city. The snow started to blanket Chicago on Tuesday afternoon and ended on early Wednesday, with lingering drizzle through 10 a.m. to noon. (Photo by Joel Lerner/Xinhua)

A pedestrian walks a dog during a winter storm in downtown Chicago, the United States, on Dec. 29, 2020. Morning commuters in Chicago experienced icy roads and slow traffic on Wednesday as the first major winter storm hit the city. The snow started to blanket Chicago on Tuesday afternoon and ended on early Wednesday, with lingering drizzle through 10 a.m. to noon. (Photo by Joel Lerner/Xinhua)