A woman walks through downtown Chicago, Illinois, Feb. 19, 2015.
Jim Young—Reuters
February 20, 2015 10:56 AM EST

Relentless, teeth-chattering, record-shattering cold gripped the eastern United States on Friday as the next winter storm threatened to make an icy, snowy mess out of the weekend for tens of millions of people.

Flint, Michigan, dipped to 25 degrees below zero, tying the record for the coldest morning there since records were established in 1921. Philadelphia, Washington and Lexington, Kentucky, had their coldest morning in two decades.

Elsewhere, from Maine to Florida, temperatures were as much as 40 degrees lower than normal. Forecasters said it might turn out to be the coldest air of the entire winter.

Cleveland recorded its lowest temperature on…

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