1. it might be so hot, that rain clouds may not form to create rain, resulting in drought.
2. if it does rain, the water would just evaporate into air, or just go into the dirt.
3. it might dry up the rain on a steep hill or patch of land, and cause a land slide since the rain wouldn't make the dirt kinda moist to keep it stiff with the pressure of anything built on top of it, like cement. if the land was dry, it would crumble up, and everything around it would be destroyed.