Another round of unspeakably cold air, courtesy of the Polar Vortex, is ready for an assault on much of the central and eastern U.S. by midweek. It will bring "dangerously" cold temperatures and howling winds to millions of Americans.
"In the Midwest and Northeast, some areas could experience their lowest December temperatures of this century," according to AccuWeather meteorologist Elliot Abrams .
Wind chills could dip to 30 to 40 degrees below zero in some spots, at which point exposed skin can develop frostbite in as little as 10 minutes, the weather service said.
Hypothermia, a medical emergency marked by uncontrollable shivering, drowsiness and confusion, is also a concern at these temperatures, especially for the elderly, people who work outside or the homeless. More than 1,000 Americans die each year due to hypothermia, the Centers for Disease Control and Prevention said.
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