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Sumène: geology and natural hazards

What public services say about the ground beneath the commune (population 1,222) and the hazards it faces: natural disasters, earthquakes, radon, cavities, clays, groundwater and rocks.

Hazard names and other data are quoted as their producers publish them, in French.

Explore the commune on the map

Sumène at a glance

Seismic zone
2 of 5 (low)
Radon potential
Category 3 of 3 (significant potential)
Recognised natural disasters
10 since 1982
Underground cavities recorded
17
Ground movements recorded
33
Risk prevention plans
1

Hazards listed by the French State

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

  • Inondation: par une crue torrentielle ou à montée rapide de cours d’eau
  • Mouvement de terrain: eboulement ou chutes de pierres et de blocs, glissement de terrain, tassements différentiels
  • Séisme
  • Feu de forêt
  • Radon
  • Transport de marchandises dangereuses
  • Affaissement minier: effondrements localisés, tassements

Recognised natural disasters

10 events recognised as a natural disaster by ministerial order since 1982.

  • Inondations et/ou coulées de boue: 10
  • Tempête: 1

  1. Inondations et/ou coulées de boue

    Event from 19/09/2020 to 20/09/2020, order published in the Journal officiel on 24/09/2020.

  2. Inondations et/ou coulées de boue

    Event from 12/09/2015 to 13/09/2015, order published in the Journal officiel on 29/10/2015.

  3. Inondations et/ou coulées de boue

    Event from 17/09/2014 to 20/09/2014, order published in the Journal officiel on 27/09/2014.

  4. Inondations et/ou coulées de boue

    Event from 02/11/2011 to 05/11/2011, order published in the Journal officiel on 19/11/2011.

  5. Inondations et/ou coulées de boue

    Event from 08/09/2002 to 10/09/2002, order published in the Journal officiel on 20/09/2002.

  6. Inondations et/ou coulées de boue

    Event from 13/10/1995 to 15/10/1995, order published in the Journal officiel on 07/01/1996.

  7. Inondations et/ou coulées de boue

    Event from 03/10/1995 to 06/10/1995, order published in the Journal officiel on 07/01/1996.

  8. Inondations et/ou coulées de boue

    Event from 03/11/1994 to 07/11/1994, order published in the Journal officiel on 25/11/1994.

  9. Inondations et/ou coulées de boue

    Event from 19/10/1994 to 21/10/1994, order published in the Journal officiel on 17/03/1995.

  10. Inondations et/ou coulées de boue, Tempête

    Event from 06/11/1982 to 10/11/1982, order published in the Journal officiel on 19/11/1982.

Earthquakes and radon

Seismic zone

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

Radon potential

Category 3 of 3: significant potential. At least part of the commune has higher-than-average uranium content. Radon is a naturally occurring radioactive gas that can build up in poorly ventilated rooms.

Beneath the town hall

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

Cavities and ground movements

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

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

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

See cavities and ground movements on the map

Risk prevention plans

  • Hérault-Rieutord

    Natural 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.

Nearby communes

Sources and limitations

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.