Emergency officials are starting to focus on alert systems as they search for answers about how the flash flooding swept away so many.

Nineteen local and state agencies were still combing the Guadalupe River on foot, boat and helicopter and with dogs and drones, Kerrville City Manager Dalton Rice said. He declined to provide an estimate of how many people are still missing,

More than 100 people have died across six counties after flash flooding from heavy rain began affecting the state last week.

The Texas Hill Country has been notorious for flash floods caused by the Guadalupe River. Here's why the area is called "Flash Flood Alley."