(CNN) -- At least one person was killed Sunday when a string of tornadoes ripped through four states, tearing roofs off homes, downing power lines and tossing trees like matchsticks.
LIVE-STREAMING weather coverage via KFOR Oklahoma
"It's tearing up everything," the pilot said. "Just ripping everything up in its sight."
Aerial video from KFOR and CNN affiliate KOCO showed severe damage near Wellston and near Carney, Oklahoma. Roofs were ripped from homes, branches stripped from trees and roads were filled with debris.
Tornadoes were also reported east of Dale, west of Paden, and near Prague in Oklahoma.
Part of Interstate 40 in Shawnee, Oklahoma, was shut down in both directions Sunday night after a tornado touched down there, overturning multiple tractor-trailers.
Still more tornadoes were spotted in Iowa, near Earlham, Huxley and east of Dallas Center, according to the weather service.
It did not mince words, telling people to take cover there, as elsewhere.
"You could be killed if not underground or in a tornado shelter. Complete destruction of neighborhoods, businesses and vehicles will occur. Flying debris will be deadly to people and animals," it said in its Kansas advisory.
The twisters are part of a severe weather outbreak that is sweeping through parts of Kansas, Oklahoma, Iowa and Missouri as the storms sweep east.
Baseball-sized hail, wind gusts and tornadoes are threatening to pummel parts of the central Plains and Midwest through Monday.
Beyond the Midwest, other areas were already seeing severe weather on Sunday. In Atlanta, serious flooding was reported amid storms producing heavy rainfall.