SimCity Tornado Disaster
SimCity Earthquake Disaster
SimCity UFO Invasion Disaster

The forces of nature and fate can strike your city at any time. Earthquakes, tornadoes, and other natural disasters can bring down your city. These events can happen at any time, so stay alert, and perhaps your city can survive. While natural disasters can’t be avoided, try not to temp fate, as other disasters (technological, environmental) can surface from the decisions you've made as mayor.

NOTE: From the Disaster menu, you can select from several disasters to unleash upon any of your claimed cities. You are granted access to each selectable disaster by completing a special achievement. Disasters are stored on your player profile, not to a particular city. Once you are granted access to a disaster, you can use it in any future city