By far, the #1 cause of deaths in flash floods is automobiles.
"Apparently what happened, they hit the high water, the vehicle probably stalled. It was found in park with the engine shut off and, we believe, high water came and just swept the vehicle off in a high ditch," Dierks said.
It happens over and over, people who are safe one minute make the fatal decision to drive into a flooded area and are swept away to their deaths. Or, emergency response personnel risk their lives to make a swift water rescue.
When driving, you do not know if the roadway has been washed away when flash flooding is in progress as this photo from Twitter reveals.