Flash floods happen when heavy rains unleash more water than the ground can absorb, causing that water to pile up and flow to low-lying areas

The Guadalupe River, winding through the scenic Texas Hill Country, has a hidden danger that struck with devastating force in July 2025. Heavy rains caused the river to surge, leading to one of the deadliest floods in recent history.

The heavy rain that turned a river in Texas into a raging wall of water was fueled by unique atmospheric conditions, according to meteorologists and climate scientists.