Millions of Australians at risk from rising sea levels and heat deaths to soar, national climate risk assessment report warns

National climate risk assessment report finds heat-related deaths would surge 450% in Sydney if global heating surpasses 3C

• Follow our Australia news live blog for latest updates

• Get our breaking news email, free app or daily news podcast

The number of heat-related deaths in Sydney could surge by almost 450% if global heating surpasses 3C, according to a landmark report that finds no Australian community would be immune from the “cascading, compounding and concurrent” risks of a worsening climate.

The report also lays bare the heightened risk from rising sea levels on Australia’s populous coastal communities, including flooding, erosion and inundation.