Meanwhile, dust storms spurred by high winds claimed almost a dozen lives on Friday. Eight people died in a Kansas highway pileup involving at least 50 vehicles, according to the state highway patrol. Authorities said three people also were killed in car crashes during a dust storm in Amarillo, in the Texas Panhandle.

Violent tornadoes ripped through parts of the U.S., wiping out schools and toppling semitractor-trailers, part of a monster storm that has killed at least 40 people across six states.