Alpes-Maritimes

Recorded Natural Hazards (Géorisques)

It has 163 municipalities and 1,128,418 inhabitants. Under the seismic zoning in force since 2011, 133 municipalities are in a medium or high seismicity zone (63% of inhabitants). A natural disaster has been declared 2,339 times since 1982 (one declaration per municipality and decree), mostly for floods (1,287) and ground movements (525). The most recent was signed on 9 July 2025. 35 municipalities have a high radon potential (category 3), home to 24% of inhabitants. 94 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

• 1982Storms · 6 November 1982158 municipalities
• 1994Floods and Mudflows · 4 November 199499 municipalities
• 1982Floods and Mudflows · 6 November 198293 municipalities
• 2019Floods and Mudflows · 23 November 201966 municipalities
• 2020Floods and Mudflows · 2 October 202055 municipalities
• 2000Floods and Mudflows · 5 November 200053 municipalities

Most Frequently Affected Municipalities

• 67Nice
• 60Cagnes-sur-Mer
• 43Cannes
• 42Grasse
• 42Antibes
• 39Villeneuve-Loubet
• 38Saint-Laurent-du-Var
• 36Mandelieu-la-Napoule

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

Hazard Levels

Hazard level assessed by ThinkHazard! (World Bank, GFDRR), meaning the likelihood of a damaging event, from very low to high.

• LandslideHigh
• WildfireHigh
• Coastal FloodMedium
• EarthquakeMedium
• Water ScarcityMedium
• Extreme HeatMedium
• Urban FloodLow
• TsunamiLow
• River FloodVery Low

Details and recommendations on ThinkHazard!