WTW Upgrades Climate Diagnostic to Screen 16 Global Risks for Corporate Resilience

Willis, a WTW business, has upgraded its Climate Diagnostic tool to provide risk managers with an independent, data-agnostic view of physical climate risks. This development allows insurance professionals to validate underwriting assumptions and challenge pricing decisions by integrating high-resolution modelling from multiple sources into a single, scalable analysis platform.

What was announced

The upgraded Climate Diagnostic platform, a component of the Willis RiskIQ suite, expands the scope of climate risk assessment beyond an organisation's immediate assets to include the broader value chain. The technology now screens for 16 distinct acute and chronic climate hazards, including tropical cyclones, floods, landslides, and droughts. By providing scenario-driven analysis, the tool aims to help firms meet evolving regulatory disclosure requirements such as the International Sustainability Standards Board (ISSB) and the Corporate Sustainability Reporting Directive (CSRD).

A significant shift in this version is its data-agnostic architecture. Instead of being tethered to a single proprietary model, the platform integrates Willis’ own hazard indices with Moody’s high-resolution flood modelling and Munich Re’s hazard indices. This multi-vendor approach allows clients to select the specific datasets most relevant to their geographic footprint or industry sector.

As a brokerage-led solution, the platform is designed to sit independently of any individual insurer’s internal modelling. This independence is intended to give clients the analytical backing to negotiate capacity and pricing during renewals. The tool is currently targeted at sectors including real estate, manufacturing, retail, and hospitality, alongside the insurance industry itself, providing a foundation for deeper business continuity planning. As the platform evolves, it is intended to provide additional decision-making support across these various sectors.

"This major upgrade to Climate Diagnostic gives risk, sustainability and finance teams one platform, multiple data sets and a coherent story for climate-related decisions. Just as importantly, it gives them an independent view of risk. Clients can choose data they trust, and walk into renewal, disclosure and investment conversations owning their view of risk."

Alvaro Linares Fuster, Senior Director, Climate Analytics, Willis

The companies involved

Willis operates as a business unit of WTW (NASDAQ: WTW), a global advisory, broking, and solutions company. WTW provides data-driven, insight-led solutions in the areas of people, risk, and capital. The firm maintains a significant presence in the global insurance market, acting as a bridge between corporate risk managers and the reinsurance and capital markets. The broader corporate landscape includes Willis Towers Watson, which has a deep history in the insurance and actuarial sectors.

It is important to distinguish this entity from Willis Limited, which is part of the WF Risk Group and operates as a separate brokerage entity. WTW’s focus on the RiskIQ platform represents a strategic push into the insurance technology space, moving beyond traditional broking services into the provision of sophisticated risk-analytics software. By leveraging partnerships with major data providers like Moody’s and Munich Re, WTW positions itself as an aggregator of risk intelligence, helping clients navigate the complexities of climate volatility and the increasing demands of environmental, social, and governance (ESG) reporting frameworks.

What FF News has reported before

FF News has previously tracked WTW’s efforts to integrate advanced climate and hazard data into practical insurance products. In May 2026, the publication reported on how Previsico and WTW Launch Landmark Parametric Flood Insurance for UK Racecourses. That initiative utilised IoT sensor technology to trigger automatic payouts, demonstrating WTW’s commitment to using high-resolution environmental data to solve specific coverage gaps in the UK market. This latest upgrade to the Climate Diagnostic platform follows that trajectory, moving from specific parametric applications to a broader, enterprise-wide risk assessment tool that serves a wider variety of industry sectors.

What this means from an insurtech perspective

This move highlights a growing tension in the insurance value chain: the democratisation of high-tier catastrophe modelling. Historically, insurers held the "black box" of risk data, often leaving brokers and MGAs at a disadvantage during pricing negotiations. By providing clients with an independent, multi-source view of risk that includes Munich Re and Moody’s data, Willis is arming the demand side of the market. This puts pressure on carrier underwriters to be more transparent about their technical pricing and loss ratios. Furthermore, as climate disclosure becomes a regulatory mandate, the ability to bridge the gap between risk management and financial reporting becomes a critical competitive advantage for brokers over traditional incumbent vendors.