The mayor of Amarillo has declared a state of disaster after a massive dust storm caused multiple fatal crashes. The storms sparked apocalyptic scenes, including destructive winds knocking over tractor trailers. NBC News’ Priscilla Thompson reports.

The mayor of Amarillo has declared a state of disaster after a massive dust storm caused multiple fatal crashes. The storms sparked apocalyptic scenes, including destructive winds knocking over tractor trailers. NBC News’ Priscilla Thompson reports.