In the beginning of the Earth there was little to nothing to see within the big planet other than dirt. Two beings named Windser and Canyon were space wondering one day from the galaxy Trestalia and fell in love with what we know now as Earth. They populated the Earth with the same green plants and foliage they had on their planet. Unlike their planet though, ours was uneven and weird, so they populated it with canyons and mountains, unlike their planet which was completely flat. They loved this planed and decided to rule over it forever.
The gods got bored with their creation of Earth and decided to populate the planet they created with humans and animals
"We love our gods"
The humans appreciated everything that the gods gave them and did for them, but they only found one problem. The way that they breathed and the consistency of the air bothered them. Relaxing by the ocean felt empty, and the frozen mountains felt stale and stagnant. Windser took their recommendations into consideration and began looking for a solution to their problem. While Windser wanted to find a solution Canyon thought of their creation as perfect. This spawned an argument between each god, and that never ended well on their planet.
This disagreement, of the want for a more exciting air, turned into a war. Where there was flat land before was now covered in mountains because of the giant gods getting slammed into the ground. The holes in the ground couldn't be filled because of their immense size and depth. This war also went into the tribes of the humans, which picked which god they sided with on the debate. That translated the war being fought between the gods onto the humans. The world now was truly split apart, and chaos reigned upon the humans.
Why would you challenge me brother?
*crowd murmurs* "WINDSER IS FINALLY DEAD?"
UGHGUHGUGHHG WHY WOULD YOU KILL ME OVER SOME DANG AIR BRO?
Windser is killed by the sheer force of his fall from their heavens. The shift in air while he is falling is enough to travel across the entire world and satisfy all of the humans. His brother, devastated because of what he did to his brother, named the force of this air shift after his brother. This force was now called "wind." Canyon survived the battle but in turn lost the war, for he had lost his brother and only somewhat satisfied the humans. The wind stopped. To honor his brother Canyon now blows across the world, satisfying the humans and honoring his brother in the process. Where tornados happen is when Canyon thinks of his brother and in a fit of rage blows super hard to get back at the human race that caused him to lash out against his brother.