I can't think of too many situations where you would have to bug out (from home) in sub-freezing weather. The conditions that would be a problem for you would also be a problems for others who might be causing you problems. Keep 'em outside long enough, let 'em freeze, then drag them off to feed to the coyotes and bears.
We had an ice storm here a few years ago that knocked down a lot of power lines. A lot of peole had to bug out to a hotel for a week to have a warm place to stay in the freezing weather.
Here's another example:
"The Three Mile Island Nuclear Power Plant near Harrisburg, Pennsylvania was the site of America's worst commercial nuclear accident. On March 28, 1979, a combination of technical malfunctions and human error caused the reactor core of Unit Two to melt, releasing radioactivity and forcing the evacuation of thousands of local residents"..................
If I remember right, the total number of displaced people hit 140,000. You never know.