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

By Rich McKay ATLANTA (Reuters) -Tornadoes killed at least 33 people across several states in the U.S. Midwest and Southeast on Saturday night, CNN reported. Missouri reported 12 fatalities spanning five counties,

A powerful storm system that tore across the United States in recent days is winding down Monday, but in its wake are devastated communities across states hit with violent tornadoes, wildfires and dust storms spun off by the massive system.

The dynamic storm from Friday through Sunday had earned an unusual “high risk” designation from weather forecasters.

The weather cut a swathe of destruction across an area of the country that is home to more than 100 million people.

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.

The National Weather Service said Monday that at least seven tornadoes hit central Alabama on Saturday. The tornadoes, which ranged from EF0 to EF3, left at least three people dead and three others injured between Saturday night and Sunday early morning,

At least seven tornadoes hit Alabama on Saturday, and that number will likely climb even higher later today. The National Weather Service plans to continue looking at storm damage and has several areas that will be visited by storm survey teams today (Monday).