"What we see is that in the early-to-mid 20th century, the annual death toll from disasters was high, often reaching over one million per year. In recent decades we have seen a substantial decline in deaths. In most years fewer than 20,000 die (and in the most recent decade, this has often been less than 10,000). Even in peak years with high-impact events, the death toll has not exceeded 500,000 since the mid-1960s.
This decline is even more impressive when we consider the rate of population growth over this period. When we correct for population – showing this data in terms of death rates (measured per 100,000 people) – we see an even greater decline over the past century. This chart can be viewed here."
The reductions you discuss are attributable to the first of those two effects. Climate change drives the second. If we mitigate climate change then we can spare ourselves the increases attributable to the second effect.
You may reply that the first effect can always outpace the second, but I hope with some thought you can recognise that there is no evidence to support that claim, and it is essentially just an article of faith.