In the recent floods in New York and Miami, we saw pictures we hoped we would never see again: abandoned, submerged cars, inundated houses, and gigantic traffic jams. Human memory works in a mysterious fashion: we tend to remember good times, while we push away bad memories. This may explain the irrational exuberance evidenced in some new construction projects.
The lesson still stands: The flood is considered one of the most devastating hazards with a predictable recurrence. Read the manual and understand the steps required to make a building enclosure floodproof in your design. The manual addresses questions frequently asked by architects suspecting their projects may be subject to the flood hazard.