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January 6, 2014 7:12 AM

Dangerous cold can mean frostbite, car trouble

The subzero cold pushing down into much of the U.S. is unlike cold weather felt in decades. The record-breaking cold is caused in part because of a "polar vortex," which one meteorologist says will send piles of polar air into the U.S. These temperatures can be dangerous, and officials in several states are warning residents to stay indoors and take precautions. Here's a look at some of the problems that arise when temperatures plummet and how to stay safe if you venture outdoors.

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