Not frequency, that's intensity. And this is, there are real conundrums here. Because we will never be able to tell whether an individual tropical cyclone was more or less intense. At the same time we have more people moving up into cyclone-prone areas and more buildings of greater value in those areas. So what we'd expect to see, aside from climate change, is more damage as we move forward into the century.
Climate change can add to that risk.
But again, an adaptation strategy is to enforce building codes, to design buildings properly and to prepare for possible inundation over parts of the city area. That's important because many of our ecosystems are already under pressure so, for example, there are some particular animals, such as Victoria's emblem which is the mountain pygmy possum which, if it warms up, has nowhere to go. There aren't any higher mountains, there's no additional habitat. So that's looking at potential extinction. Similarly, places such as Kakadu National Park can be put under severe stress from saltwater incursion.