Violent tornadoes ripped through parts of the U.S., wiping out schools and toppling semitractor-trailers in several states.

The weakening but still volatile weather system was moving Monday into the U.S. Southeast and Mid-Atlantic, bringing thunderstorms, hail, damaging winds and the potential for more tornadoes.

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,

The National Weather Service has confirmed at least four EF1 tornadoes touched down across Westmoreland and Indiana counties on Sunday as severe weather rolled through the area.