A massive winter storm dumped sleet, freezing rain and snow across much of the U.S. on Sunday, bringing subzero temperatures and halting air and road traffic.

More than 230 million people across the United States are bracing for a massive winter storm system.

More than 100,000 customers were without power in Tennessee and Texas Sunday morning, with another 100,000 in Mississippi and more than 84,000 in Louisiana also without electricity, according to the o...