The study looked at how extreme temperatures in Australia will change in the future using new climate models. They compared the old models (CMIP5) with the new ones (CMIP6) and found that the new models predict higher temperatures, especially under the worst-case scenario. The hottest areas will be in tropical Australia. The uncertainty in predicting these changes comes from both natural variability and differences between the models. This information can help plan for dealing with hotter temperatures in the future.