A levey that lasts a lifetime

Following the different discussions for a while one thing crossed my mind.
Is anybody aware that leveys can't be made to last forever? No matter how high you build 'em there's always a chance they break ore get overrun by a superstorm.....Here in Holland it's no secret and the government knows it. It's a matter of chance, once every 150 years, so that could be next year or even next week.

In the case of NOLA there have been made huge mistakes, I admit. But no government can give the reassurance this can't happen again as they rebuild and reenforce them. Never believe you can get put a halt to nature.

What were the chances a hurricane of this magnitude would hit NO?

By the way, why are discussions slowly focussing on NO, the situation is bad over there, but wasn't this spreaded over 3 states and isn't help needed somewhere else also?

the Netherlands should send engineers, holland has a great system in place.