Tarn-et-Garonne

Recorded Natural Hazards (Géorisques)

It has 195 municipalities and 265,817 inhabitants. Under the seismic zoning in force since 2011, its highest seismicity is very low (zone 1 of 5). A natural disaster has been declared 2,670 times since 1982 (one declaration per municipality and decree), mostly for drought (1,172) and floods (1,088). The most recent was signed on 8 July 2025. 3 municipalities have a high radon potential (category 3), home to 1% of inhabitants. 194 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

• 1982Storms · 6 November 1982195 municipalities
• 1999Floods and Mudflows · 25 December 1999195 municipalities
• 1999Ground Movements · 25 December 1999195 municipalities
• 1982Floods and Mudflows · 6 November 1982195 municipalities
• 2003Drought (Clay Shrinkage) · 1 July 2003107 municipalities
• 1996Floods and Mudflows · 9 January 199676 municipalities

Most Frequently Affected Municipalities

• 38Montauban
• 33Castelsarrasin
• 31Beaumont-de-Lomagne
• 30Caussade
• 30Moissac
• 26Lafrançaise
• 26Réalville
• 25Lavit

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