Global insurance and reinsurance broking group Aon has announced the expansion of its Automated Event Response (AER) service to include US Severe Convective Storms (SCS).
This enhancement has been designed to assist insurers to better manage losses, deploy resources and respond quickly to policyholders during active weather events.
US SCS has now become one of the most volatile catastrophe loss sources for the insurance industry.
According to Aon’s 2026 Climate and Catastrophe Insight report, SCS is the costliest insured peril of the 21st century, with cumulative insured losses of approximately $794 billion (pre-inflated).
In 2025 alone, US SCS caused $52 billion in insured losses, highlighting the need for faster loss intelligence during active events.
An expansion of Aon’s existing AER platform, which already covers perils including US hurricanes, European windstorms and Japanese typhoons, the US SCS service combines the broker’s latest SCS catastrophe model with daily meteorological data and storm reports.
This provides updated event loss estimates aligned to how insurers manage their portfolios, capital, and business operations as events occur.
“Against continued loss pressure from SCS on insurers’ profitability, the AER solution is designed to support faster, more confident decisions during active events and in the critical days that follow,” Aon explained.
Adding: “By delivering daily, decision-ready loss and claims count estimates, AER helps insurers manage SCS volatility across underwriting, exposure management, reinsurance and claims.”
As part of its key benefits, the solution drives faster, more confident response times; it also provides a view of gross, ceded, and net positions in reinsurance terms; helps to strengthen stakeholder communications; and it gives carriers the ability to make clearer portfolio and pricing decisions around SCS tail risk.
Tracy Hatlestad, head of North America analytics for Aon’s Reinsurance Solutions, said: “Severe convective storms are no longer isolated events for insurers – they are an ongoing source of volatility that is reshaping how capital and claims decisions are made.
“During active events and in the days that follow, carriers face increasing pressure to act earlier, communicate clearly and understand their net positions while loss information is still evolving. Having daily, decision-ready loss insights is becoming critical to managing US SCS exposure with clarity and confidence.”
Aon’s AER service for US SCS includes the following key functionality: daily modelled loss calculations; customisable event definitions aligned to contract structures; and dynamic updates for 72 hours post-event
Aon’s AER is a key addition to Aon’s wider analytics and advisory services, helping to improve clients’ speed and effectiveness when responding to unfolding catastrophe events by providing automated, daily loss insights directly to decision-makers.
AER strengthens existing modelling, claims, and event response processes, enabling clients to react with greater speed, coordination, and confidence, Aon highlighted.
