After Hurricane Katrina destroyed his house and forced him to flee to nearby Baton Rouge, Ronald Williams spent a dozen years waiting for the right time to go home. Seven months ago, after repeated government promises that New Orleans was once again about as flood-proof as the city can get, Williams finally got up the nerve to return. But on Saturday, from the steps of his new rental home, Williams watched water again pour through the city’s streets after a thunderstorm dropped as much as nine inches of rain in just four hours. The ensuing flood overwhelmed the city’s pump system and covered much of central New Orleans in several feet of water, taking 14 hours to drain […]