What would happen if humans vanished?

I think that if humans just vanished, at first it would be a disaster. There would be lots of fires from car crashes, and our gas plants would leak. We would loose power. It would make explosions and the gas would get into the air. Once it gets into the air, the wild animals would be in danger. I think some would survive, but most would die. The ones that survive would reproduce, and the gasses would eventually go away. Maybe the animals would evolve. After thousands of years, I think that the whole world would look like a bunch of abandoned houses. They would be covered in vines, and there would be plants all over. Lots of things would crumble. Maybe the Brooklyn Bridge would crumble. Millions of years after, I think there will be no man made structures whatsoever. The world will be like it was before we evolved.