polar vortex

Fire chief's beard freezes while fighting fire
A fire chief in Wisconsin shared a picture of his frozen beard where the wind chill is -50 degrees.
Polar vortex: Iowa college student found dead on campus
What is a polar vortex?
Why is it about to get so cold in much of the country?
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Polar vortex: Iowa college student found dead on campus
What is a polar vortex?
Why is it about to get so cold in much of the country?