Saône-et-Loire

Recorded Natural Hazards (Géorisques)

It has 563 municipalities and 550,310 inhabitants. Under the seismic zoning in force since 2011, its highest seismicity is moderate (zone 3 of 5). A natural disaster has been declared 4,793 times since 1982 (one declaration per municipality and decree), mostly for floods (2,506) and drought (1,015). The most recent was signed on 23 February 2025. 266 municipalities have a high radon potential (category 3), home to 42% of inhabitants. 110 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

• 1982Floods and Mudflows · 8 December 1982565 municipalities
• 1982Floods and Mudflows · 6 November 1982564 municipalities
• 1982Storms · 6 November 1982564 municipalities
• 1982Snow Load · 26 November 1982564 municipalities
• 2018Drought (Clay Shrinkage) · 1 July 2018207 municipalities
• 1983Floods and Mudflows · 12 May 1983188 municipalities

Most Frequently Affected Municipalities

• 21Louhans-Châteaurenaud
• 20Branges
• 20Mâcon
• 20Tournus
• 19Igé
• 19Prissé
• 19La Roche-Vineuse
• 19Saint-Germain-du-Plain

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