Volunteers on horseback and others with rescue dogs are scouring riverbanks with authorities in central Texas searching for victims of the catastrophic floods that claimed more than 100 lives.

On July 7, rescuers in inflatable motorboats also searched for bodies near Camp Mystic - an all-girls summer camp - where 27 campers died after being swept away by floodwaters, AFP reported.

About 30 volunteers on horseback, many wearing cowboy hats, joined mounted police from Austin to assist in rescue efforts in four towns along the Guadalupe River in Kerr County.

Michael Duncan, 55, rode his dark bay horse Ranger along the river, supporting rescue efforts that involved hundreds of searchers along several miles of the waterway.

"Obviously, (on horseback) ... we can gain more ground. We can get to some areas that people can't get to as easily," Duncan said.

The horses easily handled the hilly terrain, undergrowth, and debris left after the receding tide.

Volunteers on foot also scoured the area, detecting foul odors from undergrowth that could indicate decomposing animals or human remains.

They dug through the earth piled near the trees, using pointed sticks to look for signs of bodies.

Children's swimming goggles and a soccer ball were found during the search. | BGNES