Saint-Paul: geology and natural hazards

Seismic zone

2 of 5 (low)

Radon potential

Category 1 of 3 (low potential)

Recognised natural disasters

19 since 1993

Underground cavities recorded

20

Ground movements recorded

176

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)
• Risque industriel: effet thermique, effet de surpression, effet toxique
• Transport de marchandises dangereuses

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

• Inondations et/ou coulées de boue: 13
• Chocs mécaniques liés à l’action des vagues: 6
• Mouvement de terrain: 2
• Inondations remontée nappe: 1
• Raz de marée: 1
• Vents cycloniques: 1

1. 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.

2. Inondations et/ou coulées de boue

   Event from 02/02/2022 to 04/02/2022, order published in the Journal officiel on 13/02/2022.

3. Inondations et/ou coulées de boue

   Event from 02/01/2014 to 03/01/2014, order published in the Journal officiel on 18/01/2014.

4. Chocs mécaniques liés à l’action des vagues

   Event from 02/01/2014 to 03/01/2014, order published in the Journal officiel on 18/05/2014.

5. Inondations et/ou coulées de boue

   Event from 29/01/2011 to 30/01/2011, order published in the Journal officiel on 06/04/2011.

6. Inondations et/ou coulées de boue

   Event on 04/02/2010, order published in the Journal officiel on 13/05/2010.

7. Chocs mécaniques liés à l’action des vagues

   Event from 06/02/2009 to 08/02/2009, order published in the Journal officiel on 01/07/2009.

8. Chocs mécaniques liés à l’action des vagues

   Event from 12/05/2007 to 13/05/2007, order published in the Journal officiel on 16/11/2007.

9. 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.

10. Inondations et/ou coulées de boue

    Event from 24/02/2007 to 26/02/2007, order published in the Journal officiel on 28/03/2007.

11. Inondations et/ou coulées de boue

    Event from 04/03/2006 to 06/03/2006, order published in the Journal officiel on 23/11/2006.

12. Inondations et/ou coulées de boue

    Event from 17/02/2006 to 18/02/2006, order published in the Journal officiel on 23/11/2006.

13. Inondations et/ou coulées de boue

    Event on 02/03/2005, order published in the Journal officiel on 08/10/2005.

14. Raz de marée

    Event on 26/12/2004, order published in the Journal officiel on 03/05/2005.

15. Vents cycloniques, Inondations et/ou coulées de boue, Inondations remontée nappe

    Event from 22/01/2002 to 23/01/2002, order published in the Journal officiel on 08/02/2002.

16. Mouvement de terrain

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

17. 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.

18. Inondations et/ou coulées de boue

    Event from 15/02/1993 to 17/02/1993, order published in the Journal officiel on 27/06/1993.

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

    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.

20 underground cavities recorded (quarries, cellars, military works, natural cavities…).

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

See cavities and ground movements on the map

• PPR - Saint Paul (i+mvt)

  Natural risk prevention plan, under revision.

• PPR littoral - Saint Paul

  Natural risk prevention plan.

• PPRT BOUYGUES TP

  Technological risk prevention plan.

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

• Le Port (974)
• Les Trois-Bassins (974)
• La Possession (974)
• Saint-Leu (974)
• Saint-Denis (974)
• Cilaos (974)
• Les Avirons (974)
• Salazie (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 03/11/2026. 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.