Well, I just searched online for Kingdom Halls in the Houston area. It displayed no less than 12 locations in NORTH HOUSTON alone. Specifically, in the area north of Beltway 8, and south of the Woodlands area. That would likely be area of slightly higher elevation, and less rainfall accumulation.
I counted an additional 28 Halls in various other parts of the city, located south of the Beltway.
Note that the iphone maps feature counts all Jehovah's Witness structures, so presumably, some of these could actually be their larger assembly halls.
One should also not discount the many Halls in smaller cities and towns along interstates 45, and 10. Towns like Conroe, and Huntsville all have Kingdom Halls, according to the map...this areas would be well away from the worst flooding, and perfect for sheltering families/elderly, ect.
Bottom line is, they're blindly turning away from their own teaching to "imitate Jesus."
The worst is yet to come, folks. As with Katrina, we're about to witness a high body count. The numbers will add up as the waters recede, and the WT Society will have stood on the sidelines, doing absolutely NOTHING. Sad.