OK Benefit Concert Draws 60,000

Toby Keith did his hometown proud at Saturday's Oklahoma Twister Relief Concert at the University of Oklahoma as a sold-out crowd enjoyed an oppressively overheated show packed with country music superstars and one Red Rocker.

The lineup at the Gaylord Family Oklahoma Memorial Stadium featured Keith as headliner, plus Willie Nelson, Sammy Hagar, Ronnie Dunn, Carrie Underwood and Wade Hayes, but the coup of the day was an appearance by Garth Brooks and his wife, Trisha Yearwood.

According to USA Today, it was well after dark when Keith was introduced to the record-breaking crowd of 60,000-plus by Oklahoma Gov. Mary Fallin.

"We may have had setbacks here, but we will have a really strong Oklahoma comeback," she told the raucous audience before Keith strolled onto the stage wearing a guitar emblazoned with sponsor Ford 's logo and began his show with Made in America.

Rather than an encore, the audience was treated to 10 minutes of fireworks.

The concert had the largest number of paid attendees in the stadium's history, and all proceeds benefited the United Way of Central Oklahoma's May Tornadoes Relief Fund. Walmart and the Walmart Foundation committed $1 million to the fund.

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Nearly 1,300 people were treated for heat-related problems Saturday at a benefit concert for Oklahoma tornado victims, a hospital spokesperson said.

Most of the people received minor treatment at cooling stations or a medical facility within the University of Oklahoma stadium in Norman, but 170 required more treatment and 21 were taken to hospitals, Kelly Wells, spokesperson for Norman Regional Health System told NBC News.