Destiney Bell’s yard is flooded, and this isn’t the first time. Most storms turn Bell’s lawn into a lake, transforming her house on a busy New Orleans corner into an island of inconvenience. A half hour of heavy rain means that she wades through half a foot of water just to leave her house. Her roommate, a doctor, often worries that she won’t be able to get out of their flooded driveway and to get to work.