Survivors have described the floods along the Guadalupe River as a “pitch black wall of death” and said they received no emergency warnings.

Flash flooding is common enough around the crescent-shaped region from Dallas through the Hill Country, the area earned the nickname "Flash Flood Alley."

Crews search for victims of flooding that has killed almost 90 people in Texas Hill Country, with the risk of more flooding still high in central parts of the state. Authorities said Monday that the death toll was sure to rise.