This project brings together a group from around Australia, many who are members of the Health Environments and Lives (HEAL) Network. The project is transdisciplinary with qualitative, environmental epidemiology and discovery science working together to establish who is most at risk, what climate conditions increase risk, and why extreme heat causes pregnancy complications. Working with community members and other stakeholders we will co-design approaches to minimise the adverse effects of extreme heat in pregnancy. This will include health education for individuals, health organisations and health care workers, identification of clinical applications and new public health and policy approaches so that we can all be better prepared for, prevent, and respond to the problems caused by exposure to extreme heat in pregnancy.