Chicago's record for coldest temperature broken as polar vortex strikes city

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Homeless people are seen bundled in their tents underneath the Fullerton Ave viaduct along the Kennedy Expressway in Chicago, the United States, on Jan. 30, 2019. Chicago's record for the coldest temperature was shattered on Wednesday as the polar vortex struck the biggest city in the U.S. Midwest, according to the National Weather Service (NWS). (Xinhua/Patrick Gorski)