Disasters are various catastrophes that may befall your city. They range from giant lizards and UFOs to the more mundane earthquake or tornado. There are 6 "proper" disasters, though a nuclear meltdown, fires and plague could all be counted as such, despite not being in the disasters menu, and therefore impossible to create by a player. To create a disaster, you must do certain things that you are not told in game, and then it will be unlocked if they are done, and you can trigger it on our city as you wish.
Tornado
The tornado is a large whirling wind that sweeps through your city for several seconds, then disappears. The buidlings it had passed over will be destroyed, though some won't, sometimes by luck, or because they are too strong. For example, the univerity won't be damaged by it. If it goes over water, it turns a more bluey color rather than brown, and looks like a waterspout.
UFOs
UFOs are flying sauces that fly across the city and abduct people, causing them to say various things about aliens such as "It's them little green men again!" in red flashy text bubbles. It will also destroy buildings.
Zombies
Zombies will appear, and then begin to roam about, trying to find people, whose brains they will eat, transforming them into zombies. Police will try to shoot them. With a decent police force, they can be contained easily, though if not, they can potentially make the city devoid of life. People will move back in quickly though, and whenever day comes by, the zombies all burn and the disaster ends. Zombies only kill people.
Earthquake
The earthquake is a shaking of the ground in a line, with the centre being the most powerful. It will destroy buildings in the area with not much visual, but a lot of shaking for a few seconds.
Meteor
A meteor is actually technically a meteorite, a large rock that comes down from the sky and strikes your city, causing damage wherever it hits. Several will come down each time, making it more of a shower, and causing much damage in scattered positions.
Big Lizard
The big lizard is a large, dinosaur-reptile like thing, which burrows up and walks about the city, destroy buildings as it walks. It is green, and will find its way to the nearest garbage dump, where it will eat rubbish, then burrow down, possibly popping up somewhere else. After a while, it disappears underground for good, ending the disaster.
