Oklahoma Gov. Kevin Stitt said one person died in Oklahoma after driving into smoke caused by the storms, adding wildfires have burned more than 170,000 acres and have destroyed more than 290 homes.

The number of fatalities increased after the Kansas Highway Patrol reported eight people died in a highway pileup caused by a dust storm Friday in Sherman County. At least 50 vehi

The meteorological agency said: "If you live in these areas, get to the sturdiest structure you have access to and remain in place until the storms pass." Mike Kehoe, governor of Missouri - where the 11 deaths were reported across four south-easterly counties - said the state had been "devastated by severe storms and tornadoes,