Hazard vs. State: Two Approaches to Understanding Vulnerability

When a disaster strikes, why do some communities recover quickly while others struggle for years? The answer lies in understanding vulnerability-not just as exposure to hazards, but as a complex web of physical, social, and economic factors. Two major approaches have shaped how we assess vulnerability in disaster management: the hazard-centered view and the social-structural view. Understanding these perspectives helps disaster managers design more effective interventions and build truly resilient communities.

The hazard and impact approach: focusing on exposure 🔗

The hazard and impact approach emerged from the natural sciences and engineering fields, concentrating on biophysical vulnerability-essentially, how physical environments and structures respond to hazardous events. This perspective treats vulnerability primarily as a function of exposure to natural hazards and their intensity.

According to research on integrated volcanic risk assessment, this approach emphasizes combining information on hazard characteristics, exposed systems, and the propensity of these systems to suffer damage. The focus remains heavily on risk exposure-identifying who and what is in harm’s way when disasters strike.

For instance, when assessing earthquake vulnerability using this approach, planners map fault lines, estimate ground shaking intensity, and identify buildings in high-risk zones. Vulnerability assessment tools commonly measure exposure by analyzing population density in hazard-prone areas, construction quality of buildings, and proximity to potential disaster sources like flood plains or unstable slopes.

Strengths and limitations 🔗

The hazard and impact approach excels at quantifying physical risks and has produced valuable tools like hazard vulnerability analyses used by healthcare facilities and emergency planners. It enables precise calculations of potential damage and helps prioritize infrastructure investments.

However, this approach has significant limitations. It cannot explain why disasters disproportionately affect certain populations even when exposure levels are similar. As noted in disaster risk research, the poor tend to suffer more from disasters regardless of their location, suggesting that vulnerability extends beyond mere physical exposure.

The state of vulnerability approach: understanding root causes 🔗

The state of vulnerability approach shifts focus from hazards to people, examining how social attributes and structural conditions create differential susceptibility to disasters. This perspective emerged from development studies and political economy, recognizing that vulnerability is fundamentally shaped by social, economic, and political systems.

Research on socio-economic vulnerability reveals that this concept emerged from linking vulnerability to larger socio-political conditions and people’s limited access to resources for coping with disasters and climate change. The approach is dominated by political-economic and structural perspectives that examine how power relations, resource distribution, and historical inequalities shape vulnerability.

Structural vulnerability refers to deep-rooted conditions embedded in social systems that systematically disadvantage certain groups. These include poverty, political marginalization, discrimination, inadequate governance, and lack of access to education or healthcare. According to vulnerability dynamics research, structural factors like policy agendas, resource management, wealth distribution, and economic development patterns combine with natural events to make individual hazards uniquely impactful in different contexts.

Why social factors matter more than location 🔗

Consider two coastal communities facing the same hurricane threat. One community has well-enforced building codes, evacuation plans, emergency shelters, and social safety nets. The other lacks these protections due to chronic underinvestment and political marginalization. The second community will experience far greater losses-not because the hazard differs, but because structural conditions amplify their vulnerability.

Research shows that social vulnerability is socially constructed, arising from everyday social and economic circumstances rather than natural conditions alone. Disaster vulnerability reflects who has power, resources, and voice in society-and who doesn’t.

Bohle’s framework: external exposure and internal capacity 🔗

German geographer Hans-Georg Bohle synthesized these perspectives into what’s known as the “double structure of vulnerability,” which recognizes both external and internal dimensions of vulnerability.

The external side relates to exposure to risks and shocks. Bohle’s framework identifies three theoretical influences on external vulnerability: Political Economic approaches examining social inequalities and asset control, Human Ecology Perspectives analyzing population dynamics and environmental management capacity, and Entitlement Theory relating vulnerability to people’s inability to obtain or manage assets through legitimate economic means.

The internal side focuses on coping capacity-the ability to anticipate, resist, and recover from hazard impacts. This dimension is influenced by Crisis and Conflict Theory examining control of assets and resources, Action Theory exploring how people respond within societal constraints, and Models of Access to Assets studying how vulnerability can be reduced through improved resource access.

Human ecology perspective 🔗

Human ecology examines how populations interact with their environment and manage natural resources. This perspective recognizes that environmental degradation, resource depletion, and unsustainable land use patterns increase vulnerability. Communities dependent on degraded ecosystems or living in ecologically fragile areas face heightened disaster risks-not just from hazard exposure, but from weakened environmental systems that can no longer buffer against shocks.

Entitlement theory and access to resources 🔗

Economist Amartya Sen’s entitlement approach transformed famine analysis and broader vulnerability understanding. Sen argued that disasters often stem from “entitlement failure”-people’s inability to access necessary resources-rather than absolute resource scarcity.

According to entitlement theory, each person has an entitlement to combinations of goods and services they can access through legal means, including production, trade, employment, and state provisions. When these entitlements fail-due to job loss, price spikes, market collapse, or policy changes-vulnerability increases dramatically even when aggregate resources remain adequate.

For disaster vulnerability, this means examining not just whether relief supplies exist, but whether affected populations can actually access and use them. A cash-poor farmer may face starvation despite food availability in markets. An unemployed urban worker may lack shelter despite empty buildings nearby. Vulnerability analysis must therefore examine economic systems, labor markets, social safety nets, and legal frameworks that determine resource access.

Integrating both approaches for effective disaster management 🔗

Neither approach alone provides a complete picture. The hazard-focused view identifies physical risks but misses social drivers of vulnerability. The state-of-vulnerability approach explains differential impacts but requires hazard analysis to assess actual risks.

Modern disaster management increasingly adopts integrated frameworks. Research on social vulnerability and community resilience demonstrates that effective risk reduction requires addressing both exposure to hazards and underlying social conditions that create susceptibility.

Practical integration means combining hazard mapping with social vulnerability indices, linking infrastructure improvements with livelihood strengthening, and connecting early warning systems with community capacity building. When planning disaster risk reduction, practitioners should ask: Who is exposed to which hazards? Why are they exposed? What prevents them from protecting themselves? What resources and capacities exist for recovery?

What do you think? How might understanding both external hazard exposure and internal coping capacity change disaster preparedness in your community? Can vulnerability reduction succeed if it addresses hazards but ignores structural inequalities that determine who faces the greatest risks?

References

1. https://appliedvolc.biomedcentral.com/articles/10.1186/s13617-021-00108-5
2. https://wkc.who.int/our-work/health-emergencies/knowledge-hub/community-disaster-risk-management/vulnerability-assessment-tools
3. https://www.prb.org/resources/disaster-risk/
4. https://www.sciencedirect.com/science/article/pii/S2666592123000525
5. https://pmc.ncbi.nlm.nih.gov/articles/PMC11951036/
6. https://en.wikipedia.org/wiki/Social_vulnerability
7. https://www.cdema.org/virtuallibrary/index.php/charim-hbook/methodology/5-risk-assessment/5-3-vulnerability
8. https://www.britannica.com/science/famine/Entitlement-failure
9. https://en.wikipedia.org/wiki/Theories_of_famines
10. https://pmc.ncbi.nlm.nih.gov/articles/PMC5739329/