At least 120 people have been found dead since heavy rainfall overwhelmed the river and flowed through homes and youth camps in the early morning hours of July 4.

By the time I watched the video, I’d seen the images of upturned bunk beds, muddied stuffed animals, tiny T-shirts snagged on branches.

Thousands of first responders were still combing through piles of mud-covered debris in Texas Hill Country on Thursday, hoping against long odds to find survivors six days after flash floods swept th...