A massive winter storm stretching more than 2,300 miles is sweeping across the United States, placing more than 240 million people in 40 states at risk of snow, ice, and dangerously cold temperatures,

Almost 4,000 flights were canceled in the U.S. on Saturday ahead of a monster winter storm that has already cut power to thousands of utility customers as far west as Texas, and threatened to paralyze...

It comes as parts of Texas are covered in ice and governors of 17 states have announced emergency declarations.