And I said: They do.
And then you said: Thats crap, a hurricane broke the flood containment system and caused massive flooding...
Read your home owners policy; I can guarantee you it has something close to this in it:
Under exclusions:
"Number 1) We do not insure for loss caused directly or indirectly by any of the following: such loss is excluded regardless of any other cause or event contributing concurrently or in any sequence to the loss:
c.) Water damage, meaning:
1.) Flood, surface water, waves, tidal water, overflow of a body or water, or spray from any of these, whether or not driven by wind.
2.) Water which backs up through sewers and drains or which overflows from a sump; or
3.) Water under the surface of the ground, including water which exerts pressure on or seeps or leaks through a buidling, sidewalk, driveway, foundations, swimming pool, or other structure.
Direct loss by fire, explosion, or theft resulting from water damage is covered.
Most of the water damage in New Orleans was caused by failure of a drainage canal. And, drainage water isn't flood water.