In US Midwest, minus 5.5C 'feels like spring' after days of brutal cold
The Midwest's worst cold snap in two decades was created by the polar vortex, a reservoir of icy air that usually swirls over the North Pole. Shifting air currents caused it to slip down through Canada and into the US Midwest this week.
By February 02, 2019 at 09:09AM
By February 02, 2019 at 09:09AM
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