The map below shows areas that were under water in Jefferson and Orleans parishes in New Orleans as of 8/31/2005. The image below has been stiched together from maps that are available here on a FEMA website.



On FEMA's site you can find separate and more detailed maps (pdf files) showing all areas of New Orleans that were under water in Orleans, Jefferson, St. Bernard, Plaquemines, and St. Charles parishes.

UPDATE 09/07/2005: C&C Technologies, Inc. has put together a clickable map (integrated with Google maps) that gives an estimate of floodwater crest depth at any point in New Orleans. Here's a sample screen cap:



Instructions for using the map are on this page, with a link at the bottom of that page that'll take you to the clickable map.

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[Note: Because small businesses collectively provide the majority of jobs, the re-opening of small businesses will be absolutely crucial to the long-term recovery of regions affected by Hurricane Katrina. If you'd like to help small businesses put their people back to work as quickly as possible, please consider contributing to the Small Business Disaster Relief Fund. Further information is available here.]