The Hawaiian legend of Pele and Kamapua’a explains why the east side of the Big Island is wet and the west side of the Big Island is dry. The story is as follows:
Why the Big Island has a wet and dry side. The Legend of Pele and Kamapua’a
Legend has it that two deities — the volcano goddess Pele and the demi-god Kamapua’a (the latter of whom could control the weather) — struck a deal to make the vast Big Island of Hawaii’s west side so dry, and its east side so wet. The story’s short version is that, after a battle, the pair divided the island in two, with Pele taking the western half and Kamapua’a, the eastern.