DALLAS: More than 9,000 flights across the US set to take off over the weekend have been canceled as a major storm expected to wreak havoc across much of the country threatens to knock out power for days and snarl major roadways.

Roughly 140 million people were under a winter storm warning from New Mexico to New England.

The National Weather Service forecast warns of widespread heavy snow and a band of catastrophic ice stretching from east Texas to North Carolina.

Forecasters say damage, especially in areas pounded by ice, could rival that of a hurricane.

Ice and sleet that hit northern Texas overnight were moving toward the central part of the state on Saturday, the National Weather Service in Fort Worth said.