Uninsurable Futures? Why nature is becoming a macroeconomic issue

In recent years, property owners in parts of California and Florida have seen insurers reduce coverage or withdraw altogether from high-risk zones. Premiums in some regions have risen sharply. Public insurance schemes – such as the U.S. National Flood Insurance Program – have faced mounting fiscal pressure.

What if these developments were not isolated insurance market adjustments but reflected early signals of a deeper shift in how climate and ecological risks are reshaping economic exposure?

At a moment when global attention is dominated by geopolitical tensions and security crises, the economic implications of environmental risks can easily appear secondary. Yet for financial institutions, insurers and regulators, these structural pressures continue to accumulate beneath the surface of the global economy.

For decades, modern finance has operated on a practical assumption: that risk can be assessed, priced and, where appropriate, transferred. Insurance remains a central component of that architecture, helping stabilise balance sheets and enabling long-term investment in the face of uncertainty.

In parts of today’s risk landscape, however, that assumption is increasingly being tested. According to Swiss Re, the global natural catastrophe protection gap – the portion of economic losses not covered by insurance – has averaged around USD 100–120 billion annually in recent years.¹ The Bank for International Settlements (BIS) has similarly cautioned that climate-related risks may strain traditional mechanisms of risk transfer and carry implications for financial stability.²

The diagnosis presented in the WWF Insurance Protection Gap report – presented during an InTent hosted event in Davos in January 2026 – is straightforward: the widening insurance protection gap has become much more than an industry challenge. As climate- and nature-related physical risks intensify, entire regions, assets and activities are becoming harder to insure. When private coverage retreats, the residual risk does not disappear – it migrates to households, corporations and increasingly to public balance sheets.

For corporate leaders and investors, insurability forms part of the enabling environment that underpins asset value, financing conditions and operational continuity.

Risk transfer in a changing risk landscape

Insurance is most effective when risks are diversifiable and not perfectly correlated. Many emerging climate and ecological risks challenge that logic. Wildfires, droughts or floods increasingly affect entire regions or supply chains rather than isolated assets. For example, data compiled in the WWF Insurance Protection Gap report indicate that homeowners’ insurance underwriting results have deteriorated across several U.S. states in recent years, underscoring how repeated regional losses can challenge traditional risk-pooling models.³

As physical risks intensify and become more correlated, the parameters of insurability can become more complex and capital-intensive. Premium adjustments, stricter underwriting standards and higher capital requirements are rational responses to that environment.

Central banks are taking note. The Network for Greening the Financial System (NGFS), representing more than 140 central banks and supervisors, has highlighted both climate- and nature-related risks as relevant to financial stability.⁴ In a recent speech, a member of the Executive Board of the European Central Bank similarly emphasised that ecosystem degradation and biodiversity loss can translate into macro-financial risks through their impact on production systems, supply chains and asset valuations.

The implications extend beyond insurers. Mortgage markets depend on reliable coverage. Infrastructure investment assumes predictable risk pricing. Sovereign balance sheets absorb residual disaster risk when private and capital markets withdraw. The widening protection gap therefore reflects broader shifts in underlying risk dynamics and should not be viewed purely as a technical insurance issue.

Insurability has historically functioned as an early signal of changing risk dynamics. For example, after major disasters such as Hurricane Andrew in 1992 or the Northridge earthquake in 1994, insurers withdrew from certain high-risk markets, prompting the creation of state-backed insurance mechanisms in Florida and California. When insurance conditions shift, it often reflects deeper structural changes in the physical or economic environment. In that sense, the protection gap can be interpreted as a leading indicator of where climate and ecosystem pressures are beginning to reshape economic risk.

Nature as economic infrastructure

At the root of many of these dynamics lies the condition of natural systems that underpin economic resilience.

A growing body of scientific and economic research has documented the protective functions of ecosystems, highlighting how natural systems can reduce disaster risk and stabilise economic activity when they remain intact.

Forests reduce runoff and stabilise slopes. Wetlands absorb storm surges. Healthy soils retain water and sustain agricultural productivity. Coral reefs, for example, are estimated to reduce wave energy by around 97%, providing natural coastal protection for millions of people and billions of dollars of infrastructure. These ecosystems therefore function as buffers within the broader economic system.

When those buffers weaken, exposure increases. Flood impacts intensify where wetlands have been lost. Drought effects amplify where soils have degraded. As these underlying systems deteriorate, expected loss profiles shift and insurance markets adjust accordingly.

The World Economic Forum has estimated that a significant share of global economic activity depends on ecosystem services.⁵ The World Bank has examined the macroeconomic implications of ecosystem degradation.⁶ While precise quantification varies across methodologies, there is broader institutional recognition that environmental degradation carries material economic and financial consequences.

In that sense, nature functions less as an external environmental concern and more as foundational economic infrastructure. Its degradation increasingly manifests in balance sheets, premiums, disaster recovery costs and public expenditure.

This connection was a central theme in discussions at InTent in Davos this year, where regulators, insurers and policymakers examined how physical climate- and nature-related risks are reshaping insurability in advanced economies, and what upstream adjustments might mitigate that trend.

Prevention, incentives and financial exposure

Research on disaster risk reduction finds that upstream investment in risk reduction can improve long-term economic outcomes compared with repeated post-event compensation. The World Bank’s Lifelines: The Resilient Infrastructure Opportunity report, for example, estimates that every dollar invested in resilient infrastructure can generate around four dollars in avoided losses and economic benefits.⁶

Strengthened flood protection, ecosystem restoration, soil health improvements and supply chain diversification can all reduce expected loss profiles over time.

In Switzerland, for example, protective forests play a critical role in reducing avalanche and landslide risks, protecting infrastructure and communities while significantly lowering potential disaster costs. Similar approaches are emerging globally, where nature-based solutions are increasingly considered part of broader resilience strategies.

Yet incentives across many markets remain misaligned with long-term resilience. Zoning decisions, subsidy structures, procurement practices and capital allocation frameworks may unintentionally increase exposure in vulnerable areas.

As environmental degradation intersects with fiscal stability, insurance affordability and food security, the interdependence between environmental and economic risks becomes more visible. For boards and executive teams, this shifts the issue from one of sustainability positioning to one of exposure management.

Strategic implications for corporate leaders

For corporate leaders, the practical implications are concrete:

• How exposed are core assets and suppliers to regions where insurability conditions are tightening?
• How might changes in coverage affect cost of capital or operational continuity?
• Are ecosystem dependencies incorporated into enterprise risk assessments?
• Are resilience investments evaluated as part of financial risk mitigation, rather than solely as ESG initiatives?

Some firms are beginning to integrate nature-related risks into scenario analysis and capital planning, informed by emerging disclosure frameworks such as the Taskforce on Nature-related Financial Disclosures (TNFD). Others are investing in nature-based solutions within supply chains to stabilise production and reduce volatility, a practice often referred to as ‘insetting’.

These decisions increasingly intersect with conversations with insurers, lenders and regulators. While such measures do not eliminate risk, they can influence its trajectory and potentially its price.

A structural adjustment

Insurance markets are adapting. In several jurisdictions, new mechanisms have emerged to maintain coverage in high-risk areas, such as the United Kingdom’s Flood Re scheme, which pools flood risk between government and insurers to maintain the availability of household coverage.

Public–private partnerships are also evolving. Risk pools and insurance partnerships have expanded globally to help bridge disaster protection gaps and improve financial resilience against climate-related hazards.

Supervisory frameworks are incorporating climate- and nature-related risk analysis. Central banks and supervisors within the Network for Greening the Financial System (NGFS), for example, have begun integrating environmental risk scenarios into financial stability assessments.

Taken together, these developments suggest adjustment rather than breakdown.

At the same time, the protection gap highlights that risk transfer mechanisms operate within ecological and physical constraints. Where underlying resilience erodes, financial mechanisms alone cannot fully compensate.

Integrating nature into financial risk frameworks is therefore becoming a practical question of financial stability: maintaining the ecological conditions on which markets ultimately depend.

For corporate leaders, the issue is not whether insurance will continue to exist. It is whether the underlying risk environment on which insurability depends is being managed with sufficient foresight.

In a world of increasingly interconnected exposures, combining risk transfer with deliberate investments in resilience may prove more durable than relying on transfer mechanisms alone.

The widening insurance protection gap is therefore not only a warning about the limits of insurance. It is also a signal that the resilience of natural systems is becoming an increasingly important determinant of economic stability.

Visual map designed by Ole Qvist-Sørensen, BiggerPicture.dk following the “Uninsurable Futures? – Leveraging climate mitigation and nature to increase resilience” session at Davos 2026, examining how physical climate and nature risks are eroding insurability in advanced economies, based on WWF policy brief and flagship report publish in January 2026.