Overview

• About 1.5 million coastal residents are projected to face sea-level and coastal flooding risks by 2050, growing to roughly three million by 2090.
• Under a 3C scenario, heat-related deaths are forecast to surge, including an estimated 444% increase in Sydney and 423% in Darwin.
• Economic impacts include an estimated A$611 billion loss in property values by 2050, potentially rising to A$770 billion by 2090, with annual disaster costs around A$40 billion by mid‑century.
• Risks are described as cascading and concurrent, with Northern Australia, remote communities and outer suburbs most vulnerable, and Queensland containing 18 of the 20 most‑exposed regions.
• The assessment models outcomes at 1.5C, 2C and 3C of warming and cites advice that current global commitments point to roughly 2.9C without stronger action.