Australia warns of severe heatwave deaths and extreme weather with a new climate risk report.

Australia's first National Climate Risk Assessment warns of severe impacts from rising global temperatures, including a potential 400% increase in heatwave-related deaths in Sydney and 250% in Melbourne if temperatures rise by 3°C. The report predicts more frequent flooding and potentially more severe tropical cyclones, while acknowledging uncertainties in drought forecasts. The government is releasing a National Adaptation Plan to address these risks, though some changes like sea level rise are deemed unavoidable.