Locally I've noticed an increasing tendency of the soil to form cracks during dry spells, and they no longer close quickly with a good rain. It takes days and days of generous rain to make them close now. This is not a good thing.
On the bright side, humans are good at improving soil when they bother to do so. Adding organic matter solves a wide range of problems. If soil does not have good drainage, sand or fine gravel may be added. Another excellent trick is to plant daikon radish, which forms an arm-sized root. If you let it die instead of harvesting it, you have an arm-sized insert of organic matter in the ground, which helps aeration and water absorption.