How do I turn off disasters in SimCity?

Solution 1:

Only way you can disable disasters if you are playing in Sandbox Mode. Sandbox Mode is dependent on the region. The person creating the region has the option to make it Sandbox Mode.

This allows:

• All Buildings
• Limited Cheats
• No Random Disasters

Note: Sandbox cities are ineligible for achievements, challenges, or leaderboards.

Here is a picture showing you how you can do it.

Solution 2:

The regions Cape Trinity and Sunrunner Bay don't have Tornados or Earthquakes (source: https://docs.google.com/spreadsheet/pub?key=0AjxiNeaKIskndFRybzhWaEJfeUw5RW1ySjZoMlh5emc&single=true&gid=0)

There's no way to avoid the other disasters, besides turning on Sandbox Mode for the region.