Allier

Recorded Natural Hazards (Géorisques)

It has 317 municipalities and 333,298 inhabitants. Under the seismic zoning in force since 2011, its highest seismicity is moderate (zone 3 of 5). A natural disaster has been declared 2,554 times since 1982 (one declaration per municipality and decree), mostly for floods (1,015) and drought (895). The most recent was signed on 22 June 2025. 174 municipalities have a high radon potential (category 3), home to 49% of inhabitants. 78 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

• 1999Floods and Mudflows · 25 December 1999317 municipalities
• 1999Ground Movements · 25 December 1999317 municipalities
• 1982Floods and Mudflows · 6 November 1982317 municipalities
• 1982Storms · 6 November 1982317 municipalities
• 2018Drought (Clay Shrinkage) · 1 July 2018189 municipalities
• 2003Drought (Clay Shrinkage) · 1 July 200393 municipalities

Most Frequently Affected Municipalities

• 23Bellerive-sur-Allier
• 23Cusset
• 21Montluçon
• 20Vichy
• 18Domérat
• 17Saint-Germain-des-Fossés
• 17Espinasse-Vozelle
• 16Neuvy

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