(FOX NEWS) A so-called “polar vortex” of dense, frigid air descended upon much of the U.S. Monday, dropping temperatures in some parts of the country to near-record lows and prompting wind chill warnings from Montana to Alabama.

The Midwest is being hit with the brunt of the cold, with temperatures plunging to 36 below zero — the coldest in the nation — in Crane Lake, Minn.

Alternatively, the warmest weather Monday morning is in the Southern Florida cities of Hollywood and Punta Gorda, with temperatures there at 84 degrees.

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