Landes

Recorded Natural Hazards (Géorisques)

It has 327 municipalities and 433,570 inhabitants. Under the seismic zoning in force since 2011, its highest seismicity is moderate (zone 3 of 5). A natural disaster has been declared 2,189 times since 1982 (one declaration per municipality and decree), mostly for floods (1,257) and ground movements (378). The most recent was signed on 22 June 2025. 1 municipalities have a high radon potential (category 3), home to 0% of inhabitants. 32 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 1999327 municipalities
• 1999Ground Movements · 25 December 1999327 municipalities
• 2009Wave Impact, Coastal Flooding · 24 January 2009327 municipalities
• 2009Floods and Mudflows · 24 January 2009327 municipalities
• 2022Drought (Clay Shrinkage) · 1 July 202281 municipalities
• 1988Floods and Mudflows · 17 June 198846 municipalities

Most Frequently Affected Municipalities

• 20Peyrehorade
• 19Tarnos
• 16Amou
• 15Bélus
• 15Cauneille
• 15Hastingues
• 14Saint-Martin-de-Seignanx
• 13Pouillon

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