Such conditions resulted in a pileup on Interstate 70 last week in western Kansas involving dozens of cars and trucks that left eight people dead. Blinding dust also prompted New Mexico's transportation department to close Interstate 25 from the Colorado border southwest to Las Vegas, New Mexico.

Unusually vicious and damaging weather across multiple U.S. states spawned violent tornadoes, blinding dust storms and fast-moving wildfires over the weekend, leaving at least 39 people dead. In the latest tally of the destruction,

Violent tornadoes ripped through parts of the U.S., wiping out schools and toppling semitractor-trailers in several states, part of a monster storm that has killed at least 32 people, with more severe weather was expected late Saturday into Sunday.