According to the 2017 Climate Vulnerability Assessment Report for Fiji that was jointly compiled by the World Bank and the Fijian Government, climate change is expected to magnify the severity and frequency of these disasters.
It just happens to be the case that in the reverse situation -- if there is a lack of convergence -- the exchange rate system plays a major role. If exchange rates are flexible, divergence in anti-inflationary policy can increase volatility but it is less dramatic overall. In turn, the degree of convergence is also lower, of course.