Washington: Millions of Americans hunkered down as a major winter storm hit the eastern United States with heavy snow and ice knocking power out for an estimated 130,000 customers as of early Monday. The National Weather Service (NWS) said the storm was bringing a miserable combination of heavy snow, freezing rain and high winds, impacting the southeast and coastal mid-Atlantic before moving up to New England and southern Canada. A swath from the upper Ohio Valley north to the lower Great Lakes region could expect more than a foot (30 centimeters) of snow Monday, it warned. In all, more than 80 million people fell under the winter weather alerts, US media reported. About 235,000 were without power Sunday but by early Monday that had fallen to around 130,000 along the east coast and Kentucky as supplies were restored, according to the website PowerOutage.US. The storm spawned damaging tornadoes in Florida and flooding in coastal areas, while in the Carolinas and up through the Appalachians icy conditions and blustery winds raised concerns. Transport was seriously disrupted, with thousands of flights canceled, and a portion of busy interstate highway I-95 closed in North Carolina. More than 3,000 flights within, into or out of the United States were canceled Sunday. Charlotte Douglas International Airport in North Carolina was the worst-affected with 95 percent of its flights grounded, according to the FlightAware website. A further 1,200 flights had been canceled early Monday.