"City God"- disaster simulation game! Thread

I'm not actually making this game yet, but I did want to open it up to the community and see what people think of the idea. It's an isometric game, where you are given a selection of tools (terraform, buildings, roads, weather), and use it to control a map. The main point of the game is this:

1. Build a city!
2. Prepare it with sea walls, police, fire crews, hospitals, shelters, turrets, bases, reinforced buildings, and even natural obstacles like mountains and rivers!
3. Unleash disasters to test the strength of your design, such as tornadoes, fires, lightning strikes, volcanoes, earthquakes, and floods!
4. Get rated on the success of your city, then rinse and repeat.

I'll add more details when people ask questions.

I'm also working on some simple graphics for it, just for fun and to help people visualise it. I'll actually get around to adding some buildings too!