Winter Blast in Much of US Poses Serious Risks Like Black Ice, Frostbite and Hypothermia

Freezing temperatures and wind speeds are creating dangerously cold conditions in a large part of the U.S. stretching from Montana to northern Florida. The region is not expected to begin thawing out until Monday. Here are some of the dangers the winter blast poses and how to protect against them:

WIND CHILL

Wind chill describes what the air temperature feels like to human skin from the combination of wind speed and temperature. It is expected to be in the single digits in parts of the southern U.S . . .