Guadalupe River, flood, surge, natural disaster, Texasbr Transcriptbr Following a torrential downpour, the worst that anyone's ever seen, Guadalupe River rose 26 feet in less than 45 minutes, and I've even heard it went well over 30 feet. There's one story that one, The person said it had to be 60 feet at one moment. This is like a giant, giant wave in the Pacific Ocean that the best surfers in the world would be afraid to surf. And it unleashed a catastrophic flooding as the most residents were asleep in their beds. A very dark evening. The waters claimed at least 135, 140 lives.