An estimated 95 million people nationwide faced weather warnings or advisories for wind chills below zero Fahrenheit.

PORTLAND, Ore. (AP) — Subfreezing temperatures across much of the U.S. left millions of Americans facing dangerous cold as Arctic storms left four dead and knocked out electricity to tens of thousands in the Northwest, brought snow to the South, and walloped the Northeast with blizzard conditions that forced the postponement of an NFL game.