Chapter 11 of the Health Effects of Climate Change (HECC) in the UK: 2023 report. The UK is increasingly vulnerable to droughts, although they are still relatively rare occurrences. Chapter 11 presents a scoping review of the evidence on the health impacts of drought, and the future risk driven by climate change. This is the first time that a chapter on drought has been included in a ‘Health Effects of Climate Change in the UK’ report. The chapter was written by scientists at the UK Health Security Agency (UKHSA). The authors complement UK studies with relevant evidence from other countries in Europe, USA, Canada and Australia as the UK- specific evidence base remains limited.