On July 4th, 2025, tragedy struck Texas as a devastating flash flood swept through the Hill Country, killing up to 141 people — the deadliest flash flood in the U.S. since 1976. Among the victims were 27 young girls from Camp Mystic and a heroic fire chief who died trying to save others.

This video takes a sobering look at the deadliest floods in U.S. history — from the infamous 1889 Johnstown disaster to modern-day tragedies — and reveals why flash floods remain the most lethal of all.

Learn what makes flash floods so dangerous, why we’re still unprepared, and what must change to save lives in the face of worsening climate extremes.
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