Category: Climate insurance · Reviewed by Matt Bartlett, Director · Founder · Last reviewed 2026-06-10
Physical climate risk insurance is the body of underwriting practice, policy wording and capital provision through which UK insurers respond to first-party losses and business interruption arising from acute weather events (storm, flood, wildfire, hail) and chronic climate shifts (sea-level rise, heat stress, drought, subsidence).
Category: Climate insurance Also known as: Physical risk insurance; Acute physical risk cover; Chronic physical risk cover Established / Date: Concept defined in TCFD Final Recommendations, June 2017 Related concepts: Climate change insurance, Transition risk insurance, Climate stress test insurance
Physical climate risk is the first of the three risk categories identified by the Task Force on Climate-related Financial Disclosures (TCFD) in its June 2017 Final Recommendations.[1] It comprises acute risks — event-driven losses from extreme weather — and chronic risks — longer-term shifts in climate patterns affecting asset values, productivity and supply chains.
In the UK insurance market, physical climate risk is underwritten primarily through property damage, business interruption, marine, aviation, energy, agricultural and contractors’ all risks policies. There is no single “physical climate” policy; rather, exposure is modelled within catastrophe perils and incorporated into pricing, sub-limits, deductibles and reinsurance protections.
Acute physical risk manifests as windstorm (e.g. Storm Eunice, February 2022), pluvial and fluvial flood, wildfire and hail; chronic risk manifests as subsidence (London Clay belt), coastal erosion, prolonged heatwaves affecting workforce productivity and saline intrusion damaging infrastructure.
The PRA expects insurers to assess and manage physical climate risk on a forward-looking basis under Supervisory Statement SS 3/19, supplemented by the July 2020 “Dear CEO” letter requiring full embedding by year-end 2021.[2] The PRA’s Insurance Stress Test 2022 and the Bank of England Climate Biennial Exploratory Scenario (CBES), final results 24 May 2022, calibrated insurer balance sheets against early, late and no additional action transition pathways combined with physical hazard projections.[3]
Disclosure of physical risk is mandatory under TCFD-aligned Listing Rule LR 9.8.6R(8), the Companies (Strategic Report) (Climate-related Financial Disclosure) Regulations 2022 (SI 2022/31) and, for IFRS reporters in adopting jurisdictions, IFRS S2 “Climate-related Disclosures” from 1 January 2024.[4] Each requires disclosure of physical risks identified over short, medium and long-term horizons.
UK domestic flood risk is partially socialised through Flood Re, the joint Government-insurer reinsurance pool established under the Water Act 2014 (in force since 4 April 2016) for eligible residential properties built before 1 January 2009. Commercial flood risk falls outside Flood Re and is increasingly modelled at postcode and property level using JBA, Ambiental and Verisk hazard maps.
Lloyd’s and London Market reinsurers monitor accumulations using vendor catastrophe models (RMS, Verisk, CoreLogic) and apply windstorm probable maximum loss (PML) tests to property treaties. Where indemnity cover is restricted — for example for high-hazard riverside warehouses or coastal hotels — parametric products triggered by measured wind speed, rainfall or river levels can fill the gap. Subsidence is treated as a chronic peril in UK household insurance and remains a significant loss driver in Greater London and the South East.
Physical climate risk insurance is felt by UK SMEs at renewal through flood loadings, business interruption indemnity period reviews (12, 18, 24 or 36 months), supplier extensions, and increased deductibles in flood-zone postcodes. Larger insureds are increasingly asked to provide geocoded asset schedules and scenario data when placing property programmes. Listed parents must disclose material physical risks in the strategic report under s.414CB Companies Act 2006.
Brokers should ensure declared values, BI maximum indemnity periods and supply chain extensions reflect updated climate projections rather than historic averages. Resilience investment — flood barriers, raised plant, dry flood-proofing — can secure better terms and access to Build Back Better grants under Flood Re for eligible residential risks.
A Gloucestershire food processor sits within the River Severn floodplain. Following modelling against UKCP18 climate projections, its broker arranges a £25m property and £15m BI placement with a £250,000 flood deductible, an 18-month indemnity period and a parametric river-level trigger paying £2m on a one-in-thirty-year gauge reading. The strategic report discloses the residual exposure consistent with TCFD and IFRS S2, and the D&O insurer accepts the renewal without a climate exclusion.
This entry is part of the Apex Insurance Wiki. Last reviewed by Matt Bartlett on 2026-06-10. Next review: 2026-12-10.
Apex Insurance Brokers Limited. Authorised and regulated by the Financial Conduct Authority, FRN 724952. Registered in England and Wales, Companies House 07014570. This entry provides general information about UK insurance concepts and is not regulated advice. Consult your insurance broker on your specific position.
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