Saint-André: geology and natural hazards

Seismic zone

2 of 5 (low)

Radon potential

Category 1 of 3 (low potential)

Recognised natural disasters

12 since 1993

Underground cavities recorded

None

Ground movements recorded

346

Risk prevention plans

3

Natural and technological hazards to which the commune is exposed, according to the national GASPAR database.

• Inondation
• Mouvement de terrain
• Séisme
• Eruption volcanique
• Feu de forêt
• Phénomène lié à l’atmosphère: cyclone / ouragan (vent)
• Transport de marchandises dangereuses

12 events recognised as a natural disaster by ministerial order since 1993.

• Inondations et/ou coulées de boue: 10
• Chocs mécaniques liés à l’action des vagues: 4
• Mouvement de terrain: 2
• Vents cycloniques: 1

1. Vents cycloniques

   Event from 26/02/2025 to 28/02/2025, order published in the Journal officiel on 31/03/2025.

2. Inondations et/ou coulées de boue, Chocs mécaniques liés à l’action des vagues

   Event from 13/01/2024 to 15/01/2024, order published in the Journal officiel on 23/01/2024.

3. Inondations et/ou coulées de boue

   Event from 25/01/2023 to 26/01/2023, order published in the Journal officiel on 13/04/2023.

4. Inondations et/ou coulées de boue

   Event on 24/04/2018, order published in the Journal officiel on 22/06/2018.

5. Chocs mécaniques liés à l’action des vagues

   Event from 24/02/2007 to 28/02/2007, order published in the Journal officiel on 28/03/2007.

6. Inondations et/ou coulées de boue

   Event from 16/02/2005 to 18/02/2005, order published in the Journal officiel on 10/08/2005.

7. Mouvement de terrain, Chocs mécaniques liés à l’action des vagues, Inondations et/ou coulées de boue

   Event from 22/01/2002 to 23/01/2002, order published in the Journal officiel on 18/04/2002.

8. Inondations et/ou coulées de boue

   Event from 24/02/1998 to 25/02/1998, order published in the Journal officiel on 11/06/1998.

9. Inondations et/ou coulées de boue

   Event from 10/02/1994 to 12/02/1994, order published in the Journal officiel on 23/04/1994.

10. Inondations et/ou coulées de boue

    Event from 27/02/1993 to 03/03/1993, order published in the Journal officiel on 27/06/1993.

11. Inondations et/ou coulées de boue

    Event from 15/02/1993 to 17/02/1993, order published in the Journal officiel on 24/10/1993.

12. Mouvement de terrain, Chocs mécaniques liés à l’action des vagues, Inondations et/ou coulées de boue

    Event from 18/01/1993 to 20/01/1993, order published in the Journal officiel on 12/06/1993.

Seismic zone

Zone 2 of 5: low. This regulatory zoning, in force since 2011, sets the rules for earthquake-resistant construction.

Radon potential

Category 1 of 3: low potential. The geological formations have the lowest uranium content. Radon is a naturally occurring radioactive gas that can build up in poorly ventilated rooms.

What BRGM maps say at the town hall. They describe that single point: elsewhere in the commune, the ground may be quite different.

• Shrink-swell clays

• Rising groundwater

• Underground cavities

• Ground movements

• Earthquakes

• Nature of the ground

Recorded across the whole commune by BRGM, in its national databases of underground cavities and ground movements.

No underground cavity recorded (quarries, cellars, military works, natural cavities…).

346 ground movements recorded (landslides, rockfalls, collapses, mudflows…).

See cavities and ground movements on the map

• PPR Saint André

  Natural risk prevention plan.

• PPR littoraux 2016 - Saint André

  Natural risk prevention plan.

• PPR i + mvt Saint-André

  Natural risk prevention plan, under revision.

The zoning and regulations of each plan, which may prohibit or restrict building, can be consulted at the town hall and on Géorisques.

• Bras-Panon (974)
• Sainte-Suzanne (974)
• Saint-Benoît (974)
• Sainte-Marie (974)
• Salazie (974)
• La Plaine-des-Palmistes (974)
• Saint-Denis (974)
• Sainte-Rose (974)

Listed hazards, natural disasters, seismic zoning, radon potential, cavities, ground movements and prevention plans: Géorisques, published by the French ministry for the ecological transition, under Licence Ouverte Etalab 2.0, data accessed on 02/11/2026. Summary beneath the town hall: BRGM map services, queried when the page is displayed. List of communes and populations: API Découpage administratif (geo.api.gouv.fr), d’après le code officiel géographique de l’Insee, version of 30/10/2026.

This information reflects the state of knowledge at the scale of the commune or of a single point. It replaces neither a soil survey nor the official risk statement (état des risques) required for a sale or a rental, which is drawn up on the official French government service.