As the death toll from catastrophic flooding in the Hill Country comes into clearer view, Texas politicians, the Dallas sporting world and celebrities shared their sorrow across social media and appealed to their followers to aid the storm-battered region.

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.