Plans to develop a flood monitoring system in the Texas county hit hardest by deadly floods were scheduled to begin only a few weeks later.

Key questions remain unanswered about the actions Texas officials took both before and during the catastrophic July Fourth holiday floods remain unanswered.

Also: San Antonio mourned the victims in a Travis Park vigil; UTSA said one of its teachers died in the Guadalupe River flood; Kerrville officials said a privately owned drone collided with a helicopter conducting search and rescue operations.

Rain rushing to the Guadalupe took it from a depth of less than 8 feet to 37.5 feet, a deluge with as much volume as an aircraft carrier over five minutes.

With more than 170 still missing, communities must reconcile how to pick up the pieces around a waterway that remains both a wellspring and a looming menace.

The most powerful thing that I can do, is come up here and intercede with prayer for these families, that are hurting beyond what anyone can ever imagine."

Flash floods last week in Texas caused the Guadalupe River to rise dramatically, reaching three stories high in just two hours.

Officials in Kerr County, the hardest-hit region, said the number of missing remained unchanged since Tuesday, at 161. The floods have killed at least 120 people statewide.