Australia is rapidly emerging as a global hotspot for climate-related lawsuits, with its rising temperatures triggering both public health concerns and a surge in legal action. According to the newly released MJA–Lancet Countdown report, the country has seen a staggering 37% increase in excess heat factor over the past two decades—a metric that underscores the mounting intensity and frequency of heatwaves.

Professor Paul Beggs of Macquarie University, lead author and director of the Lancet Countdown Center in Oceania, highlighted the gravity of the trend. “The frequency of health-damaging heat has increased substantially since the 1970s,” he stated, underlining the broader health implications detailed in the report, which tracks climate-health intersections across five categories: health impacts, adaptation strategies, mitigation, finance, and public engagement.

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A notable new feature in this year's report is an indicator for climate-related litigation. It reveals that Australia now ranks second globally for the number of climate lawsuits filed—many of which are invoking health risks as part of their legal arguments. Between 2014 and 2023, eleven such cases directly cited health as a central concern, with courts scrutinising how climate change disproportionately harms vulnerable populations.

These legal developments reflect deeper systemic challenges. The report flags a 17% drop in volunteer firefighter numbers over seven years—compromising Australia's bushfire readiness—alongside persistent reliance on fossil fuels. While renewable energy continues to rise, traditional carbon-heavy sources remain dominant, contributing to national greenhouse gas emissions.

Australia’s health care sector is also under scrutiny, with emissions from hospitals and services peaking in 2021. Though this spike was partially influenced by the COVID-19 pandemic, experts say it reflects broader inefficiencies and an urgent need for low-emission health frameworks.

Despite these challenges, the report outlines several encouraging steps forward. The Australian Government recently completed its inaugural National Climate Risk Assessment, which identified health and social support systems as one of eleven critical priorities. Professor Hilary Bambrick of the ANU hailed the assessment as “a crucial step forward in understanding how risks are connected across sectors.”

The momentum for change is also visible in the energy sector. Renewables now make up nearly 40% of Australia’s electricity generation, and electric vehicle adoption is surging—with 98,436 EVs sold in 2023, representing 8.47% of new car sales. Yet, experts like Professor Stefan Trueck warn that the transition must be backed by robust storage infrastructure to ensure supply stability.

The MJA–Lancet Countdown also highlights lessons Australia can draw from its neighbours. While Australia narrowly avoided major climate disasters in 2023, New Zealand faced the wrath of Cyclone Gabrielle and severe flooding—proof, according to Auckland’s Professor Alistair Woodward, that climate threats transcend borders and demand shared solutions.

Looking ahead, the report stresses that the next five years are pivotal. Emissions cuts, renewable transitions, and deeper cross-sector planning will be critical—not just to mitigate environmental fallout, but to safeguard public health. With over 500 peer-reviewed publications on climate and health emerging from Australia in 2023 alone, research momentum is building.

Future versions of the Countdown will further expand their scope to include Aboriginal and Torres Strait Islander health metrics and a deeper exploration of climate-induced mental health issues.

As Australia navigates these intersecting crises, climate litigation is set to play a larger role in shaping environmental accountability and policy direction.

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