Violent tornadoes ripped through parts of the US, wiping out schools and toppling semitractor-trailers in several states, part of a monster storm that killed at least 18 people as more severe weather was expected late Saturday.

Missouri recorded more fatalities than any other state as it withstood scattered twisters overnight that killed at least 12 people, authorities said. The deaths included a man who was killed after a tornado ripped apart his home.

“It was unrecognizable as a home. Just a debris field,” said Coroner Jim Akers of Butler County, describing the scene that confronted rescuers.

“The floor was upside down. We were walking on walls.”

Dakota Henderson said he and others rescuing people trapped in their homes Friday night found five dead bodies scattered in the debris outside what remained of his aunt’s house in hard-hit Wayne County, Missouri.

“It was a very rough deal last night,” he said Saturday, surrounded by uprooted trees and splintered homes. “It’s really disturbing for what happened to the people, the casualties last night.”

Henderson said they rescued his aunt from a bedroom that was the only room left standing in her house, taking her out through a window.

They also carried out a man who had a broken arm and leg.

Officials in Arkansas said three people died in Independence County and 29 others were injured across eight counties as storms passed through the state.

“We have teams out surveying the damage from last night’s tornadoes and have first responders on the ground to assist,” Arkansas Gov. Sarah Huckabee Sanders said on X.

She and Georgia Gov. Brian Kemp declared states of emergency. Kemp said he was making the declaration in anticipation of severe weather moving in later Saturday.

On Friday, meanwhile, authorities said three people were killed in car crashes during a dust storm in Amarillo in the Texas Panhandle.

Extreme weather encompasses a zone of 100 million people

The deaths came as a massive storm system moving across the country unleashed winds that triggered deadly dust storms and fanned more than 100 wildfires.

Extreme weather conditions were forecast to affect an area home to more than 100 million people. Winds gusting up to 80 mph (130 kph) were predicted from the Canadian border to Texas, threatening blizzard conditions in colder northern areas and wildfire risk in warmer, drier places to the south.

The National Weather Service issued blizzard warnings for parts of far western Minnesota and far eastern South Dakota starting early Saturday. Snow accumulations of 3 to 6 inches (7.6 to 15.2 centimeters) were expected, with up to a foot (30 centimeters) possible.

Winds gusting to 60 mph (97 kph) were expected to cause whiteout conditions.

Evacuations were ordered in some Oklahoma communities as more than 130 fires were reported across the state. Nearly 300 homes were damaged or destroyed. Gov. Kevin Stitt said at a Saturday news conference that some 266 square miles (689 square kilometers) had burned in his state.

The State Patrol said winds were so strong that they toppled several tractor-trailers.

Experts said it’s not unusual to see such weather extremes in March.

AN-AP