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Recorded Natural Hazards (Géorisques)

It has 153 municipalities and 1,119,307 inhabitants. Under the seismic zoning in force since 2011, 8 municipalities are in a medium or high seismicity zone (0% of inhabitants). A natural disaster has been declared 1,506 times since 1982 (one declaration per municipality and decree), mostly for floods (916) and drought (470). The most recent was signed on 27 May 2025. 62 municipalities have a high radon potential (category 3), home to 76% of inhabitants. 53 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

• 2022Drought (Clay Shrinkage) · 1 April 202294 municipalities
• 2011Floods and Mudflows · 4 November 201192 municipalities
• 2017Drought (Clay Shrinkage) · 1 July 201784 municipalities
• 2019Floods and Mudflows · 23 November 201982 municipalities
• 2023Drought (Clay Shrinkage) · 1 April 202365 municipalities
• 2010Floods and Mudflows · 15 June 201044 municipalities

Most Frequently Affected Municipalities

• 33Roquebrune-sur-Argens
• 32Fréjus
• 27Hyères
• 27Saint-Raphaël
• 24Toulon
• 24Vidauban
• 23Draguignan
• 23Grimaud

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