For me, being on pier and beam (I have a two foot crawlspace under the house) has been a bit of a blessing this summer. I know MANY people on slab foundations who have been spending an inordinate amount of time soaking the soil around their foundations. I've been watering around it, but not drenching. I've been ok sofar.
Yes, I never knew a crawl space was so much better than a slab till I was house hunting and my agent told me about it, many slab homes I looked had had massive cracks in the plaster & bricks.. I also have a high crawl space in my house it's over 2' off the ground. My house is from the mid-1950's. As they say -The two words that frighten any home owner are "Foundation Problems"..