When we see video of drivers being washed down river in their cars or people being rescued from the roof of a submerged car, we often smugly wonder what they were thinking. But people often underestimate the power of just a few inches of water. Look at the following images:
A person might think they could safely drive on the left in the first picture. The picture on the right was about 2 minutes later. You can watch the whole video and see for yourself. Eventually, the road looked like this:
