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Political development predicts reduced human cost of flooding
Paola Vesco1, Nina von Uexkull2,3,4, Jonas Vestby2
1Peace Research Institute Oslo, Oslo, Norway. paoves@prio.org.
Nature Communications
|November 26, 2025
Summary
Political development, including democracy and peace, significantly reduces flood mortality. Promoting strong institutions (Sustainable Development Goal 16) is crucial for climate adaptation and disaster risk reduction.
Area of Science:
- Environmental Science
- Political Science
- Sociology
Background:
- Societal impacts of extreme weather events are influenced by hazard magnitude and population vulnerability.
- While socioeconomic factors are studied, political drivers of vulnerability, particularly for floods, are under-researched.
Purpose of the Study:
- To evaluate the impact of political development on flood mortality.
- To understand how factors like democracy, institutional quality, and peace influence the human cost of flooding.
Main Methods:
- Bayesian predictive analysis of global flood impacts from 2000 to 2018.
- Statistical modeling to assess the relationship between political indicators and flood mortality rates.
Main Results:
- Democracy, institutional quality, and peace were found to reduce predicted flood mortality.
- A breakdown of peace showed a particularly pronounced increase in predicted flood mortality.
Conclusions:
- Political factors are significant determinants of vulnerability to climate-related hazards like floods.
- Strengthening peace, justice, and institutions (Sustainable Development Goal 16) is vital for disaster risk mitigation and climate change adaptation.
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