The medical profession has a duty of care to protect and promote the health of our patients and the community. Climate change presents a current and ongoing threat to human health globally. The medical profession has a responsibility to advocate for strong action to mitigate climate change and its consequences and to understand and promote adaptation measures to protect human health. The RACP calls on its members and the wider Australasian community to act on climate change in the interests of the health of our patients, young and old, and our society.