hurricanes

I love the historical perspective on New Orleans. Why do you think Sanabel has so much planning work done when New Orleans for its size seems to have been neglected relatively? Since I don't know a lot about the background of flooding, I'd like to know if height above/below sea level is a nearly perfect predictor of flood risk. If not, then I wonder to myself who's keeping track of each acre of land and when it has been flooded in the past? There's local knowledge but it just seems hard to agregate en masse.Why do you call "greenspace" the new "four-letter word"?