Category: Climate perils · Reviewed by Chrissie Anderson, Client Executive · Last reviewed 2026-06-10
Drought is generally uninsurable under standard UK property and business interruption policies as a primary peril, but drives material indirect insurance loss through subsidence on shrinkable clays, wildfire ignition, agricultural yield loss and supply-chain disruption — with parametric rainfall-deficit and soil-moisture products increasingly used in the commercial market.
Category: Climate perils Also known as: Drought cover, Rainfall deficit insurance, Water shortage insurance Typical UK market form: Excluded as primary peril; parametric rainfall-deficit triggers for agriculture and utilities Related concepts: Subsidence insurance, Parametric insurance, Business interruption insurance
Drought is a sustained period of below-average precipitation that results in water resource deficit. The Environment Agency, in line with the Drought Plan framework under the Water Resources Act 1991, recognises four progressive drought categories: developing drought, drought, severe drought and recovering drought. Drought is assessed against multiple indicators including the Standardised Precipitation Index (SPI), river flow percentiles, groundwater levels, reservoir storage and soil moisture deficit.
Drought is distinct from a heatwave (which is a short-period extreme high-temperature event) and from a hosepipe ban (which is a Temporary Use Ban under section 76 of the Water Industry Act 1991). Drought episodes may extend across multiple seasons and affect different regions to different degrees depending on geology, hydrology and water company infrastructure. The 1976, 1995–1997, 2003, 2010–2012, 2018 and 2022 UK droughts each had significant economic impact, with the 2022 drought formally declared by the Environment Agency across multiple regions in August 2022.
The Met Office State of the UK Climate report (Kendon et al, International Journal of Climatology, 2024) confirms a trend of drier summers across much of the United Kingdom, consistent with UK Climate Projections 2018 (UKCP18). UKCP18 projects summer precipitation reductions of up to 47% in parts of southern England by the 2070s under the high-emissions pathway, with corresponding reductions in river flows, groundwater recharge and soil moisture. The Environment Agency’s National Framework for Water Resources, published 2020, and successor Regional Water Resources Plans, project material water resource gaps under future drought conditions.
ABI quarterly weather claims data does not separately report drought claims, but subsidence claims correlate strongly with extended summer moisture deficit on shrinkable clay soils — most evident in the spikes recorded after the 1976, 2003, 2018 and 2022 dry summers. The British Geological Survey GeoClimate UKCP18 dataset combines BGS soil hazard maps with UKCP18 climate projections to quantify the implications for subsidence hazard.
Standard UK household and commercial property all-risks policies do not list drought, water shortage or hosepipe ban as insured perils. Drought is generally excluded by the absence of a named peril rather than a specific exclusion. However, drought drives material insured loss indirectly through several recognised pathways:
For exposures where drought directly affects revenue — agriculture, food and beverage processing, brewing and distilling, hydro generation, navigation, and water-intensive industrial processes — the principal cover is parametric. Products are typically structured around an SPI trigger, a cumulative rainfall deficit against a stated reference period at a stated location, or a soil moisture deficit reading, with settlement on confirmation of the trigger rather than proof of indemnity loss. The London Market and specialist agricultural insurers write these products for UK risks.
The principal statutory framework comprises the Water Resources Act 1991 (in respect of water resources management by the Environment Agency, Natural Resources Wales and the Scottish Environment Protection Agency), the Water Industry Act 1991 (in respect of duties of water and sewerage undertakers, including Temporary Use Bans under section 76), and the Drought Act 1976 (which provided the original framework for drought permits and orders, since updated). The Reservoirs Act 1975 governs reservoir safety, which is itself drought-relevant where lowered reservoir levels expose dam structures to differential stress.
Water company drought plans, prepared under the Water Industry Act 1991, set out the staged response to drought conditions including demand management, supply-side options and statutory drought permits. The Civil Contingencies Act 2004 provides for emergency response coordination during severe drought events. There is no statutory drought insurance scheme.
In the commercial market, larger water-intensive operations are increasingly purchasing parametric layers to address the revenue and additional cost consequences of statutory restriction and physical scarcity. Agriculture is supported by parametric weather products and, separately, by farm subsidies under the post-Common Agricultural Policy domestic schemes (Sustainable Farming Incentive and successor schemes).
Businesses with material drought sensitivity — including agriculture, food and beverage, brewing and distilling, hydro generation, inland navigation operators, and water-intensive process industries — should map their exposure across SPI thresholds, hosepipe ban triggers, drought permit conditions and water company supply restrictions. Brokers should consider parametric layers calibrated against Met Office or Environment Agency reference data and document the alignment between trigger and underlying revenue at-risk.
For commercial property occupiers in southern and eastern England on shrinkable clay soils, drought management practices — including tree management plans, leak detection and repair on water mains, and post-drought inspection regimes — should be documented at survey stage and aligned with subsidence cover requirements.
In August 2022, following the driest July in England since 1935 and the joint-hottest summer on record, the Environment Agency formally declared drought across multiple regions of England. Hosepipe bans were imposed by several water companies, and the autumn and winter of 2022/2023 saw a marked uplift in subsidence claim notifications, consistent with the established pattern after extended summer moisture deficit on shrinkable clay soils. The 2022 drought followed the 19 July 2022 record of 40.3°C at Coningsby weather station.
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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