*2 feet* of storm surge is usually enough to knock people off their feet when they step out into the direct path of flow and carry them along until they grab onto something. People grossly underestimate the amount of force involved. 10 feet simply shoves buildings off foundations with weight alone
Probably a good time to remind people that 20 inches (half a meter) of standing water are enough to make it impossible to re-open the basement door that just closed behind you: youtu.be/VqY0-zCHx7Q?...
YouTube video by Terra X plus
As much as I believe surfing to be an inaccessible elitist sport now, I do also believe forcing People to go f around in the water will get them to learn just how powerful it is... especially if they chose to live in storm surge prone areas.
Very informative!