As in Friday’s flooding, in 1987, five to 10 inches of rain fell in the upper headwaters of the Guadalupe River basin. In Hunt, Texas, where the Guadalupe River forks, over seven inches had fallen since Thursday afternoon, which was the highest total at the site since the early 1990s.

At least 51 people, including 15 children, have died in the flooding, according to local officials. The families of four campers have confirmed their deaths to CNN, while others are enduring an excruciating wait for news on their children.