Europe Faces Escalating Coastal Flood Risks 

Feature image: Coastal flood damage to Europe’s transport networks. Baseline expected annual damage (1980–2020) and projected increases under 1.5–4 °C for global warming. The Netherlands and Belgium are excluded due to high coastal protection. Credit: Nawarat et al., Nature Climate Change (2026). 

Europe’s coastal transport lifelines, roads and railways that underpin mobility, trade, and daily well-being are increasingly at risk from coastal flooding driven by global warming. A new Nature Climate Change study (Nawarat et al., 2026) provides the first fully probabilistic, Europe-wide assessment of how rising seas and extreme coastal water levels threaten surface transport infrastructure under different global warming levels. The findings reveal escalating economic losses, widening disruption risks, and growing pressure on public budgets, even at 1.5 °C of warming. 

Key research findings  

Baseline risk (1980–2020): 

• ~1,592 km of European road and rail networks affected annually 

• €519 million median expected annual damage (EAD), up to €722 million 

With 1.5 °C global warming: 

• Affected network length rises by ~60% 

• Europe-wide EAD increases to €818 million (up to €1.1 billion) 

With 4 °C global warming: 

• Over 3,300 km of networks affected annually 

• EAD reaches €1.49 billion, more than double baseline losses 

• Roads are more frequently flooded, but railways account for a larger share of total damage due to higher reconstruction costs. 

• Countries facing the highest risks include UK, Italy, France, Norway and Denmark, with smaller economies experiencing disproportionate impacts relative to GDP. 

Polar change and coastal flooding 

Accelerated polar ice melt, driven by Arctic and Antarctic warming, contributes to global sea-level rise. Combined with stronger storm surges, this amplifies extreme sea-level events along Europe’s coasts, directly increasing flood exposure for transport networks concentrated in low-elevation coastal zones. 

Implications for Europe 

• Growing threats to passenger mobility, freight movement and supply chains 

• Rising strain on national transport budgets, with adaptation costs increasing at every fraction of warming 

Urgent response needed 

• Integrate climate risk into transport planning and investment decisions now 

• Prioritize climate-resilient design, maintenance and strategic retreat where necessary 

• Align mitigation, adaptation and modal shift strategies to reduce road dependency in flood-prone coastal zones 

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Original source: Coastal flood risk to European surface transport infrastructure at different global warming levels | Nature Climate Change