It’s the economy, stupid! - Water risks and their implications for financial systems and macroeconomic policy
The proposition: from water risk recognition to financing its reduction
The next water crisis will not stop at the riverbank. Drought, flooding, water pollution and the degradation of water-regulating ecosystems disrupt industrial production, food and energy supply, infrastructure reliability and trade. These losses travel from catchments into corporate revenues and operating costs, collateral values and insurance claims; from there into bank balance sheets, public budgets, inflation, debt sustainability and the cost of capital. The physical impacts are place-specific, but supply-chain and financial contagion may be regional or global. The resulting challenge for COP31 is no longer simply to persuade financial actors that water matters. Water-related risks are increasingly recognized as financially material, yet water remains incompletely represented in macroeconomic analysis, financial supervision and the way infrastructure projects are valued, financed and governed. Globally, the value of water-related risks amounts to 7-9 per cent of global gross national product. In a study of the euro-area financial system, nearly 60% of loans analyzed were exposed to companies with unmet flood-protection needs.
This is not another ESG disclosure discussion. Water is becoming a determinant of competitiveness, creditworthiness and long-term asset value. The relevant question is whether better risk recognition creates incentives for resilience or simply makes exposed communities, companies and governments less financeable. The side event will confront a critical challenge: water-related risks are increasingly recognized and priced by financial markets, yet this growing awareness has not translated into commensurate investments in water resilience. It will invite senior policymakers, central bankers, financial institutions, including credit agencies and multilateral development banks to articulate what they can change, individually and collectively, to close the gap between risk recognition and investment in water resilience.
1. Why water is a macroeconomic and fiscal issue
A stable hydrological cycle is a productive input, not an environmental externality. When ecosystem degradation removes natural flood protection or dry season flows, infrastructure performance deteriorates even if its engineered structures are sound. This is the passage from basin conditions to the profit-and-loss account, bank balance sheet and national budget. The fiscal stakes are high: governments can invest strategically in water resilience today or face mounting economic losses, emergency expenditures, shrinking fiscal space and rising borrowing costs tomorrow. This calls for integrating location-specific hydrology and ecosystem scenarios into growth and inflation forecasts, fiscal-risk statements, public investment management, sovereign-debt analysis and expenditure sequencing. The policy choice remains unresolved. Which water assets and natural systems merit priority investment because their failure would destabilize economic activity? How should a Ministry of Finance decide between ex-ante adaptation CAPEX and ex-post fiscal losses? One thing is clear. Early adaptation and water-resilient investment can actually strengthen long-term fiscal sustainability.
2. From Water-Risk Exposure to Financial Stability and Resilience
Water-related shocks move from basin conditions into the financial system through falling corporate revenues, rising operating costs, deteriorating collateral values and insurance losses. As exposures accumulate, they can weaken bank balance sheets and threaten financial stability. Yet financial authorities still struggle to translate local hydrological and ecosystem pressures into asset-level credit analysis, portfolio stress tests and macro-financial models. OECD (2025) calls for stronger water-specific supervisory expectations, scenario analysis, data, disclosure and sustainable finance taxonomies. The next challenge is to assess not only gross exposure to hazards, but also the residual financial risk after credible adaptation. Meanwhile, rising premiums and insurance protection gaps can undermine collateral and restrict credit, reinforcing vulnerability. The unresolved question is how lenders, insurers, rating agencies and supervisors can translate verified risk reduction into financing and underwriting decisions without driving capital and insurance away from those emerging economies that need resilience investment most. This requires credible metrics connecting basin risk to cash flows and portfolios, evidence of avoided losses, and incentives for financing adaptation rather than simply repricing exposure.
3. From Water Governance to Investable Resilience
Sound water governance and management are increasingly becoming prerequisites for attracting sustainable finance. Credible water allocation, basin governance, hydrological modelling, ecosystem monitoring and risk management help investors assess whether water resources and natural infrastructure can sustain long-term economic activity. The Climate Bonds Initiative’s 2026 Water Infrastructure Criteria illustrates how these traditional water management functions are becoming relevant to investment eligibility and certification. The question “Can this watershed support growth?” is therefore increasingly a financial one, linking water security, economic competitiveness and investment decisions.
Yet translating the economic value of water resilience into investable opportunities remains challenging. Many investments in water security, ecosystem restoration and climate adaptation generate value primarily through avoided losses, reduced financial risks and protected economic activity rather than directly monetisable revenues. The challenge is to convert these benefits into measurable financial value, credible revenue mechanisms and bankable investment opportunities. This requires coordinated interventions across three levels: the enabling policy and regulatory environment, resilient project design and appropriate capital structuring. Emerging instruments, including blue and resilience bonds, sustainability-linked finance, guarantees, blended finance and performance-based payments, offer promising approaches to mobilising private investment. However, scaling these solutions requires more than financial innovation. Governments must establish credible water governance and enabling conditions; commercial banks and investors must integrate resilience into investment appraisal, credit decisions and financial products; and MDBs and development cooperation partners must support project preparation, risk mitigation and commercially viable investment pipelines. Closing the gap between the economic value of resilience and its financial investability is essential to directing capital towards water security at scale.
The purpose of the high-level dialogue
COP31 offers an opportunity to move from a shared diagnosis of water-related financial risks towards a common agenda for coordinated action. Ministries of Finance, central banks, financial supervisors, credit rating agencies, insurers, commercial banks and development finance institutions bring complementary perspectives and capabilities to this challenge. Closer collaboration could help strengthen the integration of water risks into macroeconomic and financial decision-making, recognize and reward investments that demonstrably reduce risks, and mobilize capital for water resilience without further marginalizing vulnerable economies and communities. The challenge is to identify where these complementary roles intersect, which barriers require collective solutions, and how public and private actors can work together to translate financial risk awareness into investment at scale.
The German Development Cooperation can contribute valuable experience in bridging the hydrological, institutional and financial dimensions of water resilience. Through technical cooperation, it supports water governance, basin planning, regulatory frameworks, project preparation and financial-sector capacity development, helping connect investment needs with potential financiers. Building on this experience, the session will explore how earlier investor engagement, targeted technical assistance and closer coordination between policy reforms and investment preparation can help address barriers to private capital mobilization and deliver measurable results. The dialogue will seek to identify practical opportunities for collaboration and complementary action to strengthen economic and financial resilience through investment in water security.
