Heatwaves are a significant hazard in Australia for people and the environment. They have been responsible for more human deaths than any other natural hazard, including bushfires, storms, tropical cyclones and floods.

We have used the projections from NARCliM to provide updated information on the projected impacts of climate change on heatwaves in the near future (2030) and far future (2070).

Research results

Projected changes in mean number of heatwave days each year and  number of days above 40°C across NSW by 2070. 

• Heatwaves are projected to occur more often and last longer than currently, up to 3.5 days more on average.
• Across most of NSW there will be more days over 40°C.
• Heatwaves can have significant impact on human health including increased mortality.
• By 2030, there is projected up to 10 more heat wave days per year and by 2070 up to 33 more in the north of NSW. In the south, there is projected up to 7 more days.