Officials urge Americans to stay indoors as historic winter storm creates "catastrophic" ice conditions and triggers the largest weather alert ever.

Deep snow extending from Arkansas to New England halted traffic, canceled flights and triggered wide school cancellations Monday.

By Phil Stewart and Lewis Krauskopf WASHINGTON, Jan 24 (Reuters) - More than 4,000 flights were canceled in the U.S. on Saturday ahead of a monster winter storm that has already cut power to more than 100,

The winter storm is moving offshore but much of the eastern part of the country faces ice, bitterly cold temperatures and wind chill.

More than 200 million people are under winter storm threats as officials brace for power outages and travel difficulties.

By Shivansh Tiwary Jan 26 (Reuters) - A powerful winter storm sweeping across much of the United States forced airlines to cancel thousands of flights and delayed hundreds on Monday, as freezing rain and heavy snowfall disrupted travel and snarled transportation networks.

Winter storm: Death toll rises as winter storm continues dumping snow across the U.S Heavy snow, sleet and freezing rain are slamming large parts of the U.S. as the dangerously cold weather causes major power outages and travel disruptions.

There have been flight cancellations and delays since Friday at Fresno Yosemite International, according to the airport spokesperson.

Fern hit most of the eastern part of the United States overnight Saturday into Sunday, but continues to keep temperatures low, causing ample snow or ice impacting travel. This has led some major sports leagues to make major decisions, including delaying or postponing games on Sunday.