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

The flooding brought the Guadalupe to its second-highest point in history, according to the National Weather Service, which urged people in the affected area to move to higher ground.

Rescuers are combing through a ravaged Texas Hill Country terrain, marked by toppled trees, overturned vehicles and debris, to find survivors in Friday’s flood. Kerr County officials are expected to give an update at 10 a.