Pakistan, Jan. 26 -- More than 850,000 customers in the US as far west as New Mexico were without electricity and over 10,000 flights were canceled on Sunday during a monster winter storm that paralyzed eastern and southern states with heavy snow and ice.

As snow, freezing rain and dangerously frigid temperatures swept into the eastern two-thirds of the nation on Sunday, the number of power outages continued to rise. As of 10:47 a.m. EST (1547 GMT) on Sunday, more than 850,000 U.S. customers were without electricity, according to PowerOutage.us, with at least 290,000 in Tennessee and over 100,000 each in Mississippi, Texas and Louisiana. Other states affected included Kentucky, Georgia, Virginia and Alabama.

More than 10,200 U.S. flight...