'Polar vortex' set to bring dangerous, record-breaking cold to much of US
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Think how much worse it would be without global warming."We usually don't call something 'life threatening,'" he told FoxNews.com. "But yes, we want people to know that this is very much a life-threatening event."
Simosko urged people in the region to stay indoors when the temperature sinks. He said it is a rare event to see ground temperatures around the minus 25 degree mark combined wind gusts up to 30 miles an hour.
Meanwhile, some cities saw record lows on Friday. In Wisconsin, a record low temperature was set in Green Bay, where the mercury dipped to minus 18. The National Weather Service said that topped the 17-below-zero mark last recorded in 1979.
Sunday's playoff game in Green Bay could be among one of the coldest NFL games ever played. Temperatures at Lambeau Field are expected to be a frigid minus 2 degrees when the Packers and San Francisco 49ers kick off, and by the fourth quarter it'll be a bone-chilling minus 7, with wind chills approaching minus 30, according to the National Weather Service.