People clean snow on the road in blizzard in Chicago, the United States, on February. 1, 2015. A blizzard hit Chicago on Sunday morning and caused more than 1,000 flights cancelled. Photo:Xinhua

One lady walks her dog in blizzard in Chicago, the United States, on February. 1, 2015. A blizzard hit Chicago on Sunday morning and caused more than 1,000 flights cancelled. Photo:Xinhua

Vehicles move slowly in blizzard in Chicago, the United States, on February. 1, 2015. A blizzard hit Chicago on Sunday morning and caused more than 1,000 flights cancelled. Photo:Xinhua

One lady walks in the blizzard in Chicago, the United States, on February. 1, 2015. A blizzard hit Chicago on Sunday morning and caused more than 1,000 flights cancelled. Photo:Xinhua

Lovers kiss each other in blizzard in Chicago, the United States, on February. 1, 2015. A blizzard hit Chicago on Sunday morning and caused more than 1,000 flights cancelled.Photo:Xinhua
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