Vendée

Recorded Natural Hazards (Géorisques)

It has 253 municipalities and 713,609 inhabitants. Under the seismic zoning in force since 2011, its highest seismicity is moderate (zone 3 of 5). A natural disaster has been declared 2,632 times since 1982 (one declaration per municipality and decree), mostly for floods (1,200) and ground movements (523). The most recent was signed on 23 March 2025. 149 municipalities have a high radon potential (category 3), home to 67% of inhabitants. 100 municipalities are covered by an approved natural hazard prevention plan.

Seismicity Zones

Number of municipalities in each zone of the regulatory seismic zoning (from 1, very low, to 5, high).

Natural Disasters Declared Since 1982

Declarations per five-year period.

Most Widespread Events

• 1999Ground Movements · 25 December 1999258 municipalities
• 2010Wave Impact, Coastal Flooding · 27 February 2010258 municipalities
• 1999Floods and Mudflows · 25 December 1999258 municipalities
• 2010Ground Movements · 27 February 2010258 municipalities
• 2010Floods and Mudflows · 27 February 2010258 municipalities
• 1983Floods and Mudflows · 1 April 198388 municipalities

Most Frequently Affected Municipalities

• 26Les Sables-d'Olonne
• 20Fontenay-le-Comte
• 19Cugand-la-Bernardière
• 19Longeville-sur-Mer
• 18Bouin
• 18Montaigu-Vendée
• 18La Roche-sur-Yon
• 18Talmont-Saint-Hilaire

Hazards Listed by Municipality

Number of municipalities exposed to each natural hazard according to the departmental major risks file.

Hazards at a specific address on Géorisques