Record 2026 Drought Puts Over 12 Million French Homes at Risk of Structural Cracks
Over 12 million French residences, about a third of the housing stock, now face heightened risk of foundation cracks due to shrinking-swelling clay soils after the extreme 2026 drought.
France’s record-breaking 2026 drought, bookended by the wettest February on record and the hottest summer since 1900, has left more than 12 million homes—roughly one-third of the nation’s housing—situated on clay soils vulnerable to shrink-swell cycles (RGA). Repeated drying and re-wetting weaken foundations, producing wall cracks, warped openings and broken water pipes. The 2022 drought already generated €3.5 billion in natural-disaster insurance claims, with the Caisse centrale de réassurance forecasting a 44-162 % increase in RGA claims by 2050.
In response, the Ecological Transition Ministry introduced a clay-prevention fund in 2025 covering diagnostics and remedial works in eleven départements, but only 19 applications were filed by April 2026. Authorities have since expanded the scheme to include three-storey houses and larger crack tolerances to stimulate participation.
Why it matters
Millions of households could face costly repairs and safety issues as climate-driven droughts intensify.
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