" 
 : It was mostly from 3 or 4 websites. I'm not sure which one I got that figure from, but the same number of $100 million is quoted here and I know I've seen it elsewhere. Good catch that those two figures don't seem to jibe; perhaps they're estimates from different sources. BTW, I suspect whatever figure of New Orleans is probably for the whole Metro area; folks who remember it say suburban Jefferson Parish got much more damage than the city proper it flooded there, while the levees held in the city in '47. Maybe more research to determine just where both monitary figures were from and what they specifically refer to would be good to improve the article. Cheers,   "