<span>It can cause parts of a mountainside to break and fall away.
I hope it helps.</span>
The flooding of New Orleans during Hurricane Katrina was a human-made disaster, not a natural one. The flood-protection system for the city had been poorly designed and maintained. ... Without the levees and floodwalls, much of the city would be a shallow lake.
Vienna, Austria is the answer.
I don't get it. What's your question supposed to be???