HAMPTON ROADS — On July 4, a flash flood along the Guadalupe River overwhelmed the Texas hill country region of Kerr County. The river surged to almost 30 feet in under an hour, leading to a major rush of water. At the heart of the storm was Camp Mystic, a summer camp for girls.

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

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.

A Texas sheriff says the deaths from flash flooding in central Texas has risen to 27 people, including nine children. (AP video shot by: Lekan Oyekanmi)

The region of Texas where flash flooding killed more than 90 people -- including dozens of campers -- is known for its tendency to experience flood emergencies.

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.

Follow for live updates in the Texas flooding as the death toll rises to 120, as rescue operations start to shift to recovery phase

The threat of heavy rain is “slight” for this weekend, but with the ground fully saturated in Kerr County even small amounts of rainfall could cause flooding.