Sovereign Natural Disaster Exposure and Fiscal Risk in Latin America and the Caribbean

The Capstone project with Moody’s Ratings addressed a critical governance challenge: how climate-vulnerable nations can protect their citizens and maintain fiscal stability when facing catastrophic natural disasters. The team analyzed 574 disaster events across 26 Latin American and Caribbean countries, revealing that while average annual disaster costs remain manageable at under 0.5% of GDP, tail-risk events that reached 3–35% of GDP force sovereigns into an impossible trilemma of emergency borrowing, budget reallocation that crowds out essential services, or deferred reconstruction that perpetuates vulnerability.

The team's research demonstrated that no single financing instrument provides sufficient protection. Case studies of Jamaica's Hurricane Melissa response and Mexico's experience following the abolition of its FONDEN reserve illustrated how even well-designed catastrophe bonds can leave funding gaps, while the absence of complementary fiscal buffers forces governments into debt-financed emergency responses that burden future generations.

The team's principal recommendation was a coordinated financing strategy: parametric insurance for frequent, lower-severity events; contingent credit lines for medium-scale shocks; and catastrophe bonds for extreme tail risks. This layered approach balanced immediate liquidity needs with long-term fiscal sustainability and provided a replicable framework for countries with varying risk profiles.

The project provided a practical methodology for quantifying disaster-related fiscal exposure and a framework for integrating disaster risk into sovereign resilience assessment. By documenting the structural inequity of climate impacts, where vulnerable nations face catastrophic costs from disasters they did little to cause, the project equipped policymakers with tools to advocate for more robust climate finance mechanisms that recognize disaster vulnerability as a collective responsibility.