Kings Of Leon rocker Nathan Followill has dismissed rumors his singer brother Caleb enrolled in rehab following the cancellation of the band's U.S. tour.

The group axed a number of shows in July after Caleb walked offstage midway through a concert in Dallas, Texas amid complaints about the intense heat and problems with his voice.

The band subsequently went on hiatus and online gossips suggested Caleb booked in for treatment in rehab, but Nathan is adamant alcohol was not a factor in the group's decision to take a break.

He tells News.com.au, "Ah, no. No rehab. The drinking definitely wasn't what happened in Dallas. It was 43 degrees that day. It was dehydration and overheating. Before the show you could hear in his voice, it wasn't all there. But if we'd stopped the show there'd be a huge uproar about us cancelling right before we went on stage. Unfortunately the heat got to a couple of us and it unfolded the way it unfolded..."

Nathan insists the break "did us all good" as it allowed the rockers time to recuperate from the rigors of touring, adding, "We all knew we just needed to take a break. Caleb's voice was completely shot... The European tour before it was a strenuous tour for us. The American tour - everything just kinda came to a head."
 
"If you work yourself too hard, you'll stop one way or another. Some people probably thought it was the end... (But) we're family, we love each other. I don't think we'd ever be able to stay away from it much longer than we did."