Aon puts combined economic and insured losses from windstorms Austen and Boelo in the hundreds of millions of euros

The estimate appears in Aon's Weekly Cat Report, Reinsurance News reported on 2 November. Aon's Impact Forecasting unit says the combined economic and insured losses from the two storms are likely to reach hundreds of millions of euros. It gives no point estimate and does not say how much of the total is insured, so the figure is not a bill for insurers.

France is expected to carry the largest share, with the departments of Finistère, Seine-Maritime, Côtes-d'Armor and Manche among the most affected, according to the report. The UK and Germany are also expected to record what Aon calls "notable losses". The two storms were linked to at least four deaths.

Austen was named by the UK Met Office on 20 October and opened the 2026-27 season for the Western Group of European forecasters. It struck on 22 and 23 October, when almost 300,000 French homes lost power at the peak and orange alerts covered up to 23 departments. Boelo followed from 23 to 25 October, with gusts of 110 to 130 kph in exposed coastal and upland areas and a storm surge that flooded several Scottish town centres, including Largs.