What percentage of flash flood fatalities occur in vehicles?

  approximately 50%

Explanation: according to US statistics, over 50% of flash flood fatalities are vehicle related. Around 93% of the fatalities are due to drowning, and 42% of these accidents were vehicle related. The percentage can change depending on the city and the year of the study, but most studies show around 40-60%. So, I would say that approximately 50% occur in vehicles.

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