Maine-et-Loire

Recorded Natural Hazards (Géorisques)

It has 176 municipalities and 833,776 inhabitants. Under the seismic zoning in force since 2011, its highest seismicity is moderate (zone 3 of 5). A natural disaster has been declared 2,025 times since 1982 (one declaration per municipality and decree), mostly for floods (1,168) and drought (391). The most recent was signed on 21 April 2025. 84 municipalities have a high radon potential (category 3), home to 73% of inhabitants. 98 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

• 1999Ground Movements · 25 December 1999177 municipalities
• 1999Floods and Mudflows · 25 December 1999177 municipalities
• 1983Floods and Mudflows · 1 April 1983148 municipalities
• 1982Floods and Mudflows · 8 December 1982135 municipalities
• 1995Floods and Mudflows · 17 January 199582 municipalities
• 1988Floods and Mudflows · 15 January 198854 municipalities

Most Frequently Affected Municipalities

• 38Gennes-Val-de-Loire
• 35Brissac Loire Aubance
• 32Chemillé-en-Anjou
• 32Doué-en-Anjou
• 29Saumur
• 28Baugé-en-Anjou
• 28Noyant-Villages
• 28Loire-Authion

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