Loir-et-Cher

Recorded Natural Hazards (Géorisques)

It has 267 municipalities and 328,543 inhabitants. Under the seismic zoning in force since 2011, its highest seismicity is low (zone 2 of 5). A natural disaster has been declared 1,673 times since 1982 (one declaration per municipality and decree), mostly for floods (765) and drought (516). The most recent was signed on 23 February 2025. 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

• 1999Floods and Mudflows · 25 December 1999267 municipalities
• 1999Ground Movements · 25 December 1999267 municipalities
• 2016Floods and Mudflows · 28 May 2016143 municipalities
• 1983Floods and Mudflows · 9 April 198365 municipalities
• 1983Ground Movements · 9 April 198365 municipalities
• 2019Drought (Clay Shrinkage) · 1 July 201954 municipalities

Most Frequently Affected Municipalities

• 23Montrichard Val de Cher
• 19Valencisse
• 18Vendôme
• 17Blois
• 17Le Controis-en-Sologne
• 17Romorantin-Lanthenay
• 14Angé
• 14Valloire-sur-Cisse

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