A woman walks during the winter storm in Chicago, the United States, Jan. 17, 2020. A winter storm hit Chicago area with snow falling on Friday afternoon. (Xinhua/Wang Ping)

A woman walks at a platform of a subway station in Chicago, the United States, Jan. 17, 2020. A winter storm hit Chicago area with snow falling on Friday afternoon. (Xinhua/Wang Ping)

A snow removal vehicle runs in the winter storm in downtown Chicago, the United States, Jan. 17, 2020. A winter storm hit Chicago area with snow falling on Friday afternoon. (Xinhua/Wang Ping)

A homeless man sits on the roadside in Chicago, the United States, Jan. 17, 2020. A winter storm hit Chicago area with snow falling on Friday afternoon. (Xinhua/Wang Ping)

Commuters wait buses at a bus station in Chicago, the United States, Jan. 17, 2020. A winter storm hit Chicago area with snow falling on Friday afternoon. (Xinhua/Wang Ping)