Heat and mental health outcomes: Towards an inclusive evidence base to inform Australian practice and policy.

Climate change-driven increases in ambient temperature pose significant risks for individuals with mental and behavioural disorders, yet current research remains dominated by event-driven outcomes (e.g. heatwaves and bushfires). This framing overlooks the cumulative effects of chronic climatic exposures, particularly for socioeconomically disadvantaged populations where indoor conditions often exceed safe thresholds. We highlight key knowledge gaps and the need for inclusive, place-based research that integrates lived experience, service accessibility, and clinical care. Addressing these gaps requires co-design, health system adaptation, and policy integration to ensure interventions are targeted, equitable, and responsive to Australia's evolving climate-mental health challenge.