Two tropical storms have led to deadly inland flooding in the United States already this season, underscoring how dangerous water can be.

Texas Hill Country, where much of the flooding took place this time, is often referred to as “flash flood alley.” It's home to steep terrain and a lack of vegetation that creates a perfect storm for waters to rise quickly.

The loss of life is unimaginable. While we are still grappling with what happened, it’s important to understand the historic nature of this flood. It likely already ranks as the third-deadliest flood in Texas history.