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. Ninety-six of those killed were in the hardest-hit county in central Texas, Kerr County, where the toll includes at least 36 children.

Even though there are still dozens of people missing, and endless mounds of mangled vegetation and vehicles, it is not too soon to ask what went wrong