I tend to disagree on what constitutes a disaster...
I don't believe there is a such thing as a "natural disaster". If it's natural, how is it a disaster? If the "natural disaster" causes damage to human structures or life, it's still not a disaster to the natural world, only to this false society we have made. A volcano erupting isn't a disaster, it's a volcano doing what it does. Just because people (stupidly) decide to live below a volcano does not make it a disaster. The ocean eroding land or built structures is not a disaster, a flood is not a disaster, a tornado isn't a disaster-it happens in nature. The disaster is that people put themselves in the way of such uncontrollable forces of nature and don't expect to be wiped out. Even forest fires NEED to occur every so often to clear brush and release seeds (some seeds ONLY release when burned).