In what experts call "Flash Flood Alley," the terrain reacts quickly to rainfall steep slopes, rocky ground, and narrow riverbeds leave little time for warning.

A retired nurse, her son and a family friend say they were lucky to survive last week's flash floods in Texas that killed more than 100 people, including many summer campers.

Walston drove from his home to the Center Point Bridge on FM 480 near Highway 27, where he shot video of the river below. He recorded nearly 38 minutes of surging water as it rose over 20 feet, carrying massive cypress trees, debris and even a house.

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.

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.

New satellite images released from Maxar Technologies show the destruction of the flash floods that have resulted in the deaths of more than 100 people over the July 4 weekend.Local authorities estimate around 160 people are still missing as Thursday marks the seventh day of the search for victims.

A Houston woman whose family has owned property along the Guadalupe River for 100 years describes the unprecedented nature of the flood disaster.

The NFL is coming together to donate to the relief efforts in Texas. Kerr County and the Texas Hill Country saw catastrophic flood waters from the Guadalupe River sweep through their area during the early morning hours of July 4.

It took just 90 minutes for the river to rise more than 30 feet. A look at the historic flood levels now etched into Central Texas history.

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.