Sea‑level rise threatens up to 13 million homes in the United Kingdom

A new study warns that up to 13 million people in the United Kingdom could face long‑term risk from coastal flooding as sea levels continue to rise. The research combines recent sea‑level projections with detailed flood mapping, showing that the British coastline has already risen about 20 cm over the last century and is expected to gain another 40‑60 cm by 2100, endangering an additional half‑million residents, particularly in Lincolnshire and the Humber estuary.

Experts caution that worst‑case scenarios could see a 15‑metre rise by the year 2300, potentially inundating large parts of London. Prof. Matt Palmer of the University of Bristol described the rising oceans as a “sleeping giant” of climate change, while Dr. Rob Larter of the British Antarctic Survey emphasized the need for stronger flood‑defence measures and managed retreat to mitigate risks beyond 2100. The authors argue that planning focused only on the next century may give a false sense of security and recommend a combination of enhanced protection and strategic relocation.

The findings highlight the urgency for policymakers to incorporate long‑term sea‑level forecasts into coastal‑management strategies to safeguard millions of homes and infrastructure across the UK.