Shawnee, Okla. — One of several tornadoes that touched down Sunday in Oklahoma turned homes in a trailer park near Oklahoma City into splinters and rubble and sent frightened residents along a 100-mile corridor scurrying for shelter.

The tornadoes, high winds and hail across Oklahoma, Kansas and Iowa were part of a massive, northeastward-moving storm system that stretched from Texas to Minnesota.

At least four separate twisters touched down in central Oklahoma late Sunday afternoon, including one near the town of Shawnee, 35 miles southeast of Oklahoma City, that laid waste to much of a mobile home park.

Across the state, 21 people were injured, not including those who suffered bumps and bruises and chose not to visit a hospital, said Keli Cain, a spokeswoman for the Oklahoma Department of Emergency Management.

Heavy rains and straight-line winds hit much of western Oklahoma on Saturday. Tornadoes were also reported Sunday at Edmond, Arcadia and near Wellston to the north and northeast of Oklahoma City.

In Wichita, a tornado touched down near Mid-Continent Airport on the city’s southwest side shortly before 4 p.m., knocking out power to thousands of homes and businesses but bypassing the most populated areas of Kansas’ biggest city. The Wichita tornado was an EF1 on the enhanced Fujita scale, with winds of 110 mph, according to the National Weather Service.

Sedgwick County Emergency Management Director Randy Duncan said there were no reports of fatalities or injuries in Kansas.

In the Lawrence area, some tree damage was reported from high winds, but the expected hail never materialized.

There were also two reports of tornadoes touching down in Iowa on Sunday night.