ATLANTA (AP) — Millions of Americans from New Mexico to the Carolinas are bracing for a potentially catastrophic ice storm that could crush trees and power lines and knock out power for days, while many northern states all the way to New England could see enough snow to make travel nearly impossible, forecasters say.

A winter storm with “the potential to be historic” is eyeing a large strip of the U.S. and it appears Illinois and the Chicago area could now be a part of its path. While confidence surrounding the snowy and icy system’s track and intensity remain uncertain,

The Chicago area is expected to see more snow Tuesday into Wednesday, followed by a blast of frigid weather.

Chicago braces for extreme cold with temperatures predicted to plummet below zero and possible snow and ice storms forecasted.

Millions of Americans brace for catastrophic ice storm. What you need to know - An estimated 100 million people were under some type of winter weather watch

The major storm is set to hit starting on Jan. 23 and will stretch into the weekend, spreading snow and ice from the southern Plains to the Northeast.