My mother attends a different congregation, and they recently had a "special" Saturday afternoon talk/slide show from someone who spent some time in the post-Katrina Society-organized relief effort.
She says that this brother reported that ALL of the Kingdom Halls in New Orleans were damaged or destroyed by Katrina, and that to date, NONE of them have been repaired or rebuilt. The reason that was given was that ALL of the JWs who lived in New Orleans are living elsewhere, and the Society has little or no idea of where they are. If I remember correctly, the number of JWs there was given as 7000(?). With no JWs living there, the Society is concentrating on rebuilding homes & Kingdom Halls in other parts of Louisiana, and other states affected by the hurricanes.
I found that really hard to believe, but who knows? Has anybody else heard anything like this?