According to BBC News, excess deaths for May/June double those for the whole of summer 2025.

Grantham Institute - Climate Change and the Environment

2026 could break records for heat-associated deaths, warns the @ukhsa.bsky.social in its estimates for heat-related mortality in May and June. This follows estimates published by the Grantham Institute, the London School of Hygiene and Tropical Medicine and the UK Met Office 🧵 buff.ly/MGR5KYI