Several hundred motorists were stranded on highways in Colorado during a wintry storm late Wednesday, authorities said.
Micki Trost, a public information officer for Colorado's emergency operations center, said that around 200 people were stuck in snowy conditions and winds of up to 50 mph on I-70 east of Denver.
Some people had spent more than eight hours in their vehicles while others had abandoned them and headed to shelters, Trost added.
The Colorado National Guard sent Humvees and troops to help drivers that became stranded on I-25 between Denver and Colorado Springs.
I-25 later opened in both directions but I-70 remained closed early Thursday.