You can try to prevent it but, there are so many countless potential contingencies that I seriously doubt you can even make a dent in it.
The best thing to do IMHO is just prepare and form a disaster kit. First Aid kits, dried or canned foods, a lot of stored water, etc.
Also help alert your friends and neighbors to make disaster preparation kits as well.
And don't even dare think this won't happen to you. (Anyone).
There are floods, earthquakes, volcanic eruptions, hurricanes, tornadoes etc all the time.
Being prepared with supplies is by far the most useful strategy anyone can have. Prepare for the Inevitable. Because something will happen, it's just
a matter of time. Often times these disasters are regional, but with a global economy these days, a regional disaster affects people worldwide
So go stock up on essentials. Learn basic First Aid training like how to dress wounds, what types of plants have medicinal values, how to create fires
for boiling water, hunting and fishing techniques etc.
AFTER you are fully prepared, than go for trying to "prevent" these disasters. But you must prepare first.
Remember the order of operations here, we prioritize with the most important steps first!
Also for good information, you can check the ATS Survival forums, Google it, Youtube it, or even check out Ready.gov the official US govt disaster
With these resources no one has any excuse for not being prepared when disaster strikes!