Millions of people are on alert for dangerously cold weather, ice and flooding.
A massive ice storm is freezing Texas and the southern United States on Wednesday.
Some 60 million people in 22 states -- from New Mexico to Maine -- are on alert for dangerously cold weather, ice and flooding.
Freezing rain and sleet are in the forecast from Texas to Tennessee, before slowly transitioning into just rain as temperatures warm up late Wednesday into Thursday.
More than 1,400 flights scheduled for Wednesday nationwide had already been canceled by the morning, according to the tracking service FlightAware.
The list for cancellations included both major airports in Dallas, as well as airports in Austin and Nashville.
