SAN ANTONIO -

Rescue crews continue to search for a Canyon Lake man who was believed to be swept away by flood waters.

Sam Rosson, 23, disappeared during Thursday's overnight flooding in Comal County. 

A witness told police Rosson was attempting to retrieve some equipment in the Guadalupe River early Thursday morning when he fell into the water and was swept away.

Crews searched for Rosson by helicopter and on foot all day Thursday. The search was expected to continue at daybreak Friday.