KENNESAW, Ga. (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 Washington, D.C., Philadelphia, New York City and Boston could see enough snow to make travel very difficult or nearly impossible, forecasters say.

More than 170 million people — about half the population of the United States — were in the path of heavy snow and crippling ice, the ºÃÉ«tv Weather Service said Friday. Alerts from the weather service stretched from Arizona and Montana in the West to the Carolinas and Maine in the east.

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