Insurance companies will have to pay out

I'm in the Piney Woods of East Texas. 125 miles from the coast.
No its not flat up here. And I'm 167' above sea level.

a 3 foot thick slab, with even minimum reinforcement, would float on
any substrate. kinda like a piece of styrofoam on a body of water.
now if you meant 3 inches thick, there lies the problem.
a typical footer in a beam constructed home is anywhere from
16 to 24 inches wide, and generally 10 to 16 inches deep.
even with maximum rebar reinforcement, this foundation is
inferior to a slab (which would be 4 to 6 inches thick, and poured
on top of a basic footer).
a beam construction footer on bad soil would be like a popcicle stick
frame on an old hardtail.

The fact that the New Orleans refugees ran to Houston tells ya something... so they can feel like home? or Did they bring it with them?

3' thick is the part above ground, they is not the part or the beams where they dig holes out in the ground under ground.
Ever seen them come out with a back hoe and dig out the ground and put rebarb in the ground and pour a concrete Slab.
I'm glad I don't have one.
When the ground shifts and they have to dig under the concrete beams under the ground to lift the slab is expensive.

Can remember when I was workin in Houston there was a subdivision on Briar Forrest and the Beltway that I seen folks in there having foundation companies to come out and dig under the concrete slabs tryin to get to the beams. so they could put concrete cylinders under then till they hit sold ground to level the slab.
It don't matter how you built the concrete slab. It would move.

When I was up at Amoco Oil company doing a job I got to see fault lines running everywhere. They ran right threw the subdivision where I seen all the folks having problems with their foundations.
Between the Black Gumbo and the fault lines some home ownere spent a lot of money.
YOu could see a few houses have a problem and go to the next block and no body had a problem.
Guess a lot of it had to do with you was or or near a fault line.

Officials: Drainage system adequate during storm | News - Home

What do you think this water is gonna do to foundations. And how close does it look like to comin in the homes on Concrete slabs.
If the homes was on pier and beam foundations and the homes was 3' off the ground think how many people woudn't have their homes flooded.
Think how much insurance money would be saved.

I know that if the world ever needs an enema they can shove it into Houston !!!!!!!!!

Some people panic and everybody has to be somewhere.
If it means driving threw high water. Git out of the way.