Charente-Maritime

Recorded Natural Hazards (Géorisques)

It has 462 municipalities and 672,279 inhabitants. Under the seismic zoning in force since 2011, its highest seismicity is moderate (zone 3 of 5). A natural disaster has been declared 5,227 times since 1982 (one declaration per municipality and decree), mostly for floods (2,091) and drought (1,096). The most recent was signed on 21 April 2025. 1 municipalities have a high radon potential (category 3), home to 0% of inhabitants. 112 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

• 1999Floods and Mudflows · 25 December 1999463 municipalities
• 1999Wave Impact, Coastal Flooding · 25 December 1999463 municipalities
• 1999Ground Movements · 25 December 1999463 municipalities
• 2010Floods and Mudflows · 27 February 2010463 municipalities
• 2010Wave Impact, Coastal Flooding · 27 February 2010463 municipalities
• 1982Floods and Mudflows · 8 December 1982463 municipalities

Most Frequently Affected Municipalities

• 24Royan
• 22La Ronde
• 22Saintes
• 21Bourcefranc-le-Chapus
• 21Médis
• 21Rochefort
• 20La Clisse
• 20Moragne

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