For days, meteorologists and the National Weather Service warned dangerously cold temperatures were about to drop on much of the U.S.
The NWS even said, "This will be the coldest air many of us will have ever experienced." And the forecasts were accurate.
"The Why" took at look at conditions, how such extreme cold affects the body and even whether extreme cold is more dangerous than extreme heat (it's complicated).
"The Why" airs Mondays through Thursdays from 7-9 p.m. ET on the Newsy channel. Click here to check local listings.