@edgarblythe,
This is off the wall, as I've no idea if succulents can live in Texas -
just a suggestion to look it up.
Do oleanders live there?
I had a client whose house was saved by the expanse of Queen Anne Oleanders in front of her house. Rest of the large property burned to a crisp. They are (were) famously resistant plants. I assume there was a fire department in the area, some miles away, but it was a very desolate place and no fire truck could or would get to it.. I figure she had fast burning but not high fuel planting and then that stand of oleanders, and that the flames petered out.