How Disasters Impact Development Programs and Vice Versa

When disasters strike, they don’t just destroy infrastructure and claim lives-they can reverse years of development progress in moments. Yet this destructive relationship works both ways. Just as disasters can derail development programs, poorly planned development can create new disaster risks or amplify existing ones. Understanding this two-way relationship is essential for building resilient communities and sustainable progress.

How disasters derail development progress 🔗

Disasters are no longer rare, isolated events. Between 2019 and 2023, natural hazards caused economic losses exceeding 5% of GDP in 12 countries, with some cases reaching 30-50% of their entire economic output. This staggering impact goes far beyond immediate physical destruction.

When a disaster hits, development gains that took years to achieve can vanish overnight. Disasters undo years of progress in moments, pushing vulnerable households deeper into poverty, disrupting economic growth, straining public finances, and eroding critical infrastructure. A flood that destroys a newly built school doesn’t just damage a building-it interrupts children’s education, threatens their future opportunities, and forces governments to divert funds from other development priorities to reconstruction.

The impact is particularly severe when mitigation measures are inadequate. Roads built without flood-resistant design wash away during heavy rains. Health facilities constructed without seismic considerations collapse during earthquakes, creating a cascading crisis when medical services are needed most. Schools that remain unsafe during heatwaves put students at risk while failing to provide reliable education infrastructure.

For developing countries with limited resources, this creates a vicious cycle. According to the Intergovernmental Panel on Climate Change, developing countries have 15 times more victims of natural disasters than developed countries. These nations often lack the financial capacity to rebuild quickly, leaving communities in prolonged displacement and economic hardship. The resources needed for recovery must be pulled from development budgets, further slowing progress toward goals like poverty reduction, education, and healthcare improvement.

Reconstruction as a development opportunity 🔗

Despite their devastating impact, disasters can create unexpected opportunities for positive change. The reconstruction phase offers a critical window to not just rebuild what was lost, but to build back better-creating safer, more resilient communities that are better prepared for future shocks.

The build back better approach 🔗

The concept of “building back better” gained global attention following the 2004 Indian Ocean tsunami in Indonesia. Rather than simply restoring damaged areas to their pre-disaster condition, governments and communities recognized an opportunity to address underlying vulnerabilities. This approach has since been incorporated into the Sendai Framework for Disaster Risk Reduction as a guiding principle.

Building back better means reconstruction needs to be strong, so assets become less vulnerable to future shocks; fast, so people can return to normal life quickly; and inclusive, so nobody is left behind in the recovery process. Research shows that rebuilding stronger, faster, and more inclusively could generate benefits totaling $173 billion per year, or 31% of current disaster-related losses.

Real-world examples of transformative reconstruction 🔗

After the 2023 Herat earthquake in Afghanistan, UNDP supported a comprehensive post-disaster needs assessment that identified $402 million in recovery needs across shelter, health, education, and livelihoods. This assessment helped prioritize investments in earthquake-resistant housing, flood protection walls, and critical infrastructure built to withstand future disasters.

Pakistan similarly embraced this opportunity after a major earthquake, viewing the devastation as a chance to improve construction methods and quality. The government focused on developing seismic-resistant structural designs and supporting the local economy by utilizing regional construction materials. This approach transformed a disaster into a catalyst for long-term improvements in building safety and community resilience.

The benefits extend beyond physical infrastructure. Reconstruction creates opportunities to strengthen governance structures, improve spatial planning, address urban development challenges, and establish predictable financing mechanisms for future disasters. It’s a chance to correct past mistakes and create development that is fundamentally more sustainable and resilient.

When development increases disaster vulnerability 🔗

While reconstruction offers opportunities to reduce risk, many development initiatives inadvertently create new vulnerabilities or amplify existing ones. This paradox occurs when disaster risk considerations are absent from planning and investment decisions.

The urbanization challenge 🔗

Urbanization provides perhaps the clearest example of development increasing disaster risk. Cities generate more than 80% of global GDP and are home to 55% of the world’s population-a figure projected to reach 66% by 2050. However, 90% of urban expansion is taking place near hazard-prone areas through informal or improperly planned settlements.

When urbanization is rapid, poorly planned, and occurring in contexts of widespread poverty, it creates concentrated pockets of vulnerability. Estimates suggest that by 2050, urban population exposed to cyclones will increase from 310 million to 680 million, while earthquake exposure will jump from 370 million to 870 million people.

How urban development creates new hazards 🔗

Urban development can fundamentally alter local environments in ways that increase disaster risk. The expansion of paved, impermeable surfaces prevents rainwater absorption, increasing flood hazard in low-lying areas. Poor solid waste management blocks storm water and sewage networks, leading to waterlogging and flooding. Inadequate infrastructure and services, unsafe housing, and poor health facilities turn natural hazards into full-scale disasters.

Weak regulation compounds these problems. The lack of enforcement of building codes, planning permissions, and regulatory oversight-often linked to corruption-allows the transfer of risk from construction companies to residents who live and work in unsafe buildings. Over 800 million people worldwide live in informal settlements where occupants have no legal claim to housing, creating hotspots for disaster risk.

Environmental degradation and increased vulnerability 🔗

Development can also degrade ecosystems that historically provided natural protection against hazards. Deforestation increases landslide and flood risks. Destruction of coastal mangroves removes natural barriers against storm surges and tsunamis. During Cyclone Freddy in Malawi in 2023, mudflows from unplanned infrastructure destroyed more than 260,000 houses, most in informal settlements in high-risk areas.

The concentration of population and economic activity in hazard-prone areas-coastal zones, river valleys, and seismic zones-means that development investments themselves become increasingly exposed. This creates a troubling feedback loop where development creates wealth and infrastructure that disasters can then destroy, setting back development progress and perpetuating vulnerability.

Building resilience into development 🔗

Breaking the cycle of disasters undermining development requires integrating risk considerations into all development planning and investment. This approach, known as risk-informed development, means including disaster risk reduction and climate adaptation solutions from the start rather than treating them as afterthoughts.

Research demonstrates that every $1 invested in resilience and preparedness saves $6 in infrastructure damage and cleanup costs, plus an additional $7 in community recovery by protecting local economies and livelihoods. This makes risk-informed development not just morally imperative but economically sound.

Key strategies include strengthening early warning systems that provide timely information before disasters strike, promoting inclusive approaches that ensure vulnerable groups aren’t left behind, building urban resilience through proper planning and infrastructure, and preparing recovery frameworks before disasters occur. When development programs account for disaster risk from the beginning, they create communities that are both more prosperous and more resilient to the shocks that will inevitably come.

What do you think? How can we ensure that development programs in your community account for disaster risks from the planning stage? What role should local communities play in making reconstruction decisions after disasters to ensure that new development truly serves their needs?

References

1. https://www.worldbank.org/en/topic/disasterriskmanagement/overview
2. https://www.undp.org/belarus/stories/loss-and-damage-fund-developing-countries
3. https://blogs.worldbank.org/en/sustainablecities/after-disasters-hit-how-countries-and-communities-can-build-back-better
4. https://www.undp.org/stories/risk-informed-development
5. https://gar.undrr.org/news/urbanisation-cities-front-line-disaster-risk-reduction.html