Indre-et-Loire

Recorded Natural Hazards (Géorisques)

It has 272 municipalities and 619,362 inhabitants. Under the seismic zoning in force since 2011, its highest seismicity is moderate (zone 3 of 5). A natural disaster has been declared 2,107 times since 1982 (one declaration per municipality and decree), mostly for floods (872) and drought (839). The most recent was signed on 8 July 2025. 106 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 1999272 municipalities
• 1999Floods and Mudflows · 25 December 1999272 municipalities
• 1982Floods and Mudflows · 8 December 1982135 municipalities
• 2022Drought (Clay Shrinkage) · 1 July 202264 municipalities
• 2005Drought (Clay Shrinkage) · 1 July 200554 municipalities
• 2022Drought (Clay Shrinkage) · 1 April 202252 municipalities

Most Frequently Affected Municipalities

• 26Rochecorbon
• 26Tours
• 20Joué-lès-Tours
• 20Loches
• 20Monts
• 20Saint-Avertin
• 20Veigné
• 19Montbazon

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