The UK has a statutory requirement under the Climate Change Act (2008) to undertake a Climate Change Risk Assessment (CCRA) every five years. The Evidence Report for the Third CCRA, due 2021, will identify the most important current and future risks and opportunities to public health from climate change. It also considers whether present and planned adaptation strategies to are sufficient to manage the risks or additional action is required.

The analysis underpinning this review assesses whether risks and actions improve or exacerbate adverse health outcomes and inequalities. This paper reports on the CCRA3 evidence review, which considers the current and likely future impacts of changing flood risk, heatwaves, coastal change, air pollution, vector-borne disease and water quality on public health and healthcare delivery. All risks are assessed by their magnitude, as well as scored by urgency to address them.

This paper presents the findings for two risks - from heat and coastal flooding impacts on population health and communities. A key focus has been to explore how climate change and policy responses affect the health of vulnerable groups and who could be further disadvantaged by inappropriate adaptation policies. This includes new analysis of the climate risks to health within the built environment and within the health and social care sector. The long-term health consequences of climate change have been considered through potential policy, building and environmental “lock-in”. Such lock-ins include potential risks to inhabitants from overheating due to building regulations failing to address increasing ambient temperatures or homes being built on flood plains.

Climate change presents challenges to deliver national policy responses ensuring that adaptation remains equitable and optimal for health. The CCRA3 Evidence Report will inform the third UK National Adaptation Plan, setting out Government actions for 2023-2028.

• Assess current and future risks and opportunities to public health from climate change.
• Assess present and planned adaptation strategies for management of risks.