Lessons from Katrina
Link - Changing patterns of population made Katrina's impact worse. This article offers an interesting comparison:
History is littered with the bones of great cities built in defiance of nature, most prominently the ancient version of Alexandria, Egypt, and its great library and lighthouse. That was another city built in the squishy mouth of a great river. Two millennia later, some truths don't change, said Muir-Woods, who raised the comparison with New Orleans.