Polar vortex blasts US with life-threatening cold

11:08am PST - January 29th, 2019    chicago weather - The Guardian (AU)

Warming shelters open in midwest as Chicago area sees temperatures drop to -50F (-46C), with snow possible in southern states Polar vortex: how cold will it be? A blast of arctic-chilled air from the polar vortex brought dangerous, record-setting cold to a wi…