Overview

The Weekly Cat Report is a recurring series produced by Aon that provides a comprehensive review of global catastrophe activity. This specific edition, published on May 8, 2026, details significant natural hazards occurring in early May, including severe convective storms across Europe, Turkey, and Vietnam, alongside major flooding incidents in Afghanistan, the Democratic Republic of the Congo, and Kenya. The report serves as a global monitoring tool, combining event-specific data with broader meteorological and geophysical appendices that cover tropical cyclone tracking, seismic activity, and temperature anomalies. It provides a snapshot of natural hazards and their immediate socio-economic consequences across a wide geographic range.

Purpose

The primary purpose of this benchmark series is to shape decisions for the better by providing actionable analytic insights into natural hazards. It is designed to inform risk capital and human capital strategies, helping organisations protect and grow their businesses through data-driven awareness. By offering an initial view of the potential financial impact of recently completed or ongoing events, the report enables better risk and people decisions. It aims to provide clarity and confidence for clients, allowing them to understand the scale of disasters and the potential implications for their operations, infrastructure, and portfolios.

Methodology

The assessment is carried out using a multi-faceted framework that incorporates data from a variety of reputable international and regional sources. Meteorological recaps utilise data from organisations such as EUMETSAT and the Deutsche Wetterdienst (DWD). Global earthquake activity is tracked through the U.S. Geological Survey (USGS), while tropical cyclone data is sourced from the National Hurricane Center (NHC) and the Joint Typhoon Warning Center (JTWC). Financial loss estimates are preliminary and subject to change, derived from public media, insurance company publications, and official government agencies. The analysis also incorporates the following sources and definitions:

• Aon’s proprietary Impact Forecasting suite of catastrophe modelling products for loss estimation.
• The International Federation of Red Cross (IFRC) and UN OCHA for humanitarian impact and displacement data.
• Structures are defined broadly to include residential, commercial, and agricultural facilities damaged by natural phenomena.
• Economic loss totals are separate from insured loss estimates, representing the total portion of the loss regardless of insurance coverage.

Use for Finance Professionals

Finance professionals can utilise this report to monitor emerging risks and assess the financial materiality of recent global catastrophes. The preliminary economic loss estimates, such as those for European storms expected to remain in the several million EUR range, provide a basis for initial impact assessments and underwriting considerations. Information regarding infrastructure damage and crop losses, such as the 2,300 hectares of damaged crops in Vietnam or 8,100 hectares in Kenya, is crucial for professionals in the insurance, reinsurance, and agricultural finance sectors. Furthermore, the report provides forward-looking data through appendices regarding ENSO (El Niño-Southern Oscillation) projections and the Global Tropics Hazards Outlook, which can inform long-term investment strategies and regional risk mitigation efforts.