Answer:
what play is it, im confused what ur looking for
As you know, water evaporates in heat, and tropical places are usually very hot! Tropical implies "ocean" so, when an ocean evaporates it leaves a sandy ocean floor, which is a desert, but there are lake sized "puddles" of salt water left over, which is why there is a big salt water lake in the middle of Utah.
Foreshadowing?? If maybe later on in the story they found out they were related or something