Every time there is a significant natural disaster I eventually hear from someone that there is at least one upside: the disaster will be good for the economy. And every time I respond, "Wrong!" Inevitably this supposed economic stimulus is called a "sliver-lining." To quote on of my favorite demotivational thoughts from Despair.com, "Pessimism: Every dark cloud has a silver lining, but lightning kills hundreds of people each year who are trying to find it."
Natural disasters are bad. They destroy lives and wealth and that has no upside. After the disaster is over, people are unambiguously worse off than before and while their quality of life inevitably recovers, on average they are not better off in the long-run for having lived through the disaster.