Corse-du-Sud

Recorded Natural Hazards (Géorisques)

It has 124 municipalities and 168,306 inhabitants. Under the seismic zoning in force since 2011, its highest seismicity is very low (zone 1 of 5). A natural disaster has been declared 470 times since 1982 (one declaration per municipality and decree), mostly for floods (407) and wave action (46). The most recent was signed on 18 January 2026. 124 municipalities have a high radon potential (category 3), home to 100% 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

• 2019Floods and Mudflows · 20 December 201948 municipalities
• 2022Floods and Mudflows · 18 August 202231 municipalities
• 1993Floods and Mudflows · 31 October 199331 municipalities
• 2008Floods and Mudflows · 29 May 200828 municipalities
• 2018Wave Impact, Coastal Flooding · 29 October 201817 municipalities
• 2023Floods and Mudflows · 2 November 202317 municipalities

Most Frequently Affected Municipalities

• 15Porto-Vecchio
• 14Sartène
• 14Ajaccio
• 13Cauro
• 13Zonza
• 12Grosseto-Prugna
• 12Serra-di-Ferro
• 11Ota

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