Extreme heat risks are projected to exacerbate existing heat-related impacts on human health, vegetation and infrastructure  . In Australia, the annual frequency of days over 35°C is projected to increase 20-70% by 2030 , and 25-85%  to 80-350%  by 2090 . For example, Perth may average 36 d over 35°℃ by 2030 . In New Zealand, the annual frequency of days over 25℃ may increase 20- 60%  to 50-100%  by 2040 and 20-60%  to 130-350%  by 2090 . For example, Auckland may average 39 d over 25℃ by 2040 . Unprecedented extreme temperatures, as high as 50℃ in Sydney or Melbourne, could occur with global warming of 2.0°℃ . Heat-related costs for Melbourne during 2012-2051 are estimated at AUD$1.9 billion, of which AUD$1.6 billion is human health/mortality costs . Extreme heat is threatening liveability in some rural areas in Australia , particularly given their reliance on outside physical work and older populations.
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report