Haute-Savoie

Recorded Natural Hazards (Géorisques)

It has 279 municipalities and 861,158 inhabitants. Under the seismic zoning in force since 2011, 236 municipalities are in a medium or high seismicity zone (93% of inhabitants). A natural disaster has been declared 1,591 times since 1982 (one declaration per municipality and decree), mostly for floods (817) and storms (278). The most recent was signed on 18 January 2026. 6 municipalities have a high radon potential (category 3), home to 4% of inhabitants. 121 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 1982278 municipalities
• 1982Floods and Mudflows · 6 November 1982278 municipalities
• 1996Earthquakes · 15 July 1996156 municipalities
• 1990Floods and Mudflows · 10 February 199057 municipalities
• 1994Earthquakes · 14 December 199457 municipalities
• 1990Floods and Mudflows · 10 February 199042 municipalities

Most Frequently Affected Municipalities

• 20Annecy
• 18Fillière
• 15Chamonix-Mont-Blanc
• 14Fillinges
• 14Le Grand-Bornand
• 14Megève
• 14Glières-Val-de-Borne
• 14Sallanches

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