A major flood event also struck the Texas Hill Country in July of 1987 after a series of 17 thunderstorms moved slowly, in succession, over the headwaters of the Guadalupe River in Kerr County. Anywhere from 5 to 10 inches of rain fell on the flood-prone areas, now deemed “Flash Flood Alley,” according to a National Weather Service report.

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.

For many, Friday’s flood brought back memories of an eerily similar tragedy, when the Guadalupe River swelled in 1987, killing 10 North Texas teenagers. Those victims, along with more than 33 others who were injured, were trying to escape a Hill Country summer camp when a wall of water washed over them.

Teens at the Pot O’ Gold Christian Camp near Comfort, Texas, were swamped by a wall of water as they tried to escape.

When storms roll in, water rushes downhill fast, gaining speed and force as it moves — often with deadly results.

The devastation in Texas Hill Country isn't the first time Americans have mourned the victims of deadly floodwaters.

The Guadalupe River in Texas surged 26 feet in just 45 minutes. It caught everyone off guard - What began as a routine flood developed into a deadly disaster, with the death toll now in triple digits

Hill Country residents and volunteers on Tuesday continued picking up the pieces that the deadly waterway left behind days earlier.