Deux-Sèvres

Recorded Natural Hazards (Géorisques)

It has 252 municipalities and 375,229 inhabitants. Under the seismic zoning in force since 2011, its highest seismicity is moderate (zone 3 of 5). A natural disaster has been declared 2,655 times since 1982 (one declaration per municipality and decree), mostly for floods (1,302) and drought (729). The most recent was signed on 18 May 2025. 121 municipalities have a high radon potential (category 3), home to 46% of inhabitants. 43 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

• 2010Ground Movements · 27 February 2010256 municipalities
• 2010Floods and Mudflows · 27 February 2010256 municipalities
• 1999Ground Movements · 25 December 1999255 municipalities
• 1999Floods and Mudflows · 25 December 1999255 municipalities
• 1982Floods and Mudflows · 8 December 1982241 municipalities
• 1983Floods and Mudflows · 1 April 1983206 municipalities

Most Frequently Affected Municipalities

• 28Thouars
• 26Niort
• 25Plaine-et-Vallées
• 22La Crèche
• 21Chauray
• 21Magné
• 21Saint-Gelais
• 20Aiffres

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