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Aude (11)

Issel: geology and natural hazards

What public services say about the ground beneath the commune (population 483) 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

Issel at a glance

Seismic zone
1 of 5 (very low)
Radon potential
Category 3 of 3 (significant potential)
Recognised natural disasters
15 since 1982
Underground cavities recorded
1
Ground movements recorded
6
Risk prevention plans
None

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, par ruissellement et coulée de boue, par remontées de nappes naturelles
  • Mouvement de terrain: eboulement ou chutes de pierres et de blocs, glissement de terrain, tassements différentiels
  • Séisme
  • Feu de forêt
  • Radon
  • Rupture de barrage
  • Transport de marchandises dangereuses

Recognised natural disasters

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

  • Inondations et/ou coulées de boue: 9
  • Sécheresse: 6
  • Chocs mécaniques liés à l’action des vagues: 1
  • Poids de la neige: 1
  • Tempête: 1

  1. Sécheresse

    Event from 01/07/2022 to 30/09/2022, order published in the Journal officiel on 03/05/2023.

  2. Sécheresse

    Event from 01/07/2019 to 30/09/2019, order published in the Journal officiel on 12/06/2020.

  3. Inondations et/ou coulées de boue

    Event on 10/06/2018, order published in the Journal officiel on 20/10/2018.

  4. Sécheresse

    Event from 01/07/2016 to 30/09/2016, order published in the Journal officiel on 01/09/2017.

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

    Event from 24/01/2009 to 27/01/2009, order published in the Journal officiel on 29/01/2009.

  6. Sécheresse

    Event from 01/07/2003 to 30/09/2003, order published in the Journal officiel on 26/08/2004.

  7. Sécheresse

    Event from 01/06/2002 to 30/09/2002, order published in the Journal officiel on 23/04/2008.

  8. Inondations et/ou coulées de boue

    Event from 10/06/2000 to 11/06/2000, order published in the Journal officiel on 15/11/2000.

  9. Inondations et/ou coulées de boue

    Event on 02/08/1999, order published in the Journal officiel on 04/12/1999.

  10. Inondations et/ou coulées de boue

    Event on 30/07/1999, order published in the Journal officiel on 04/12/1999.

  11. Inondations et/ou coulées de boue

    Event on 30/05/1998, order published in the Journal officiel on 22/08/1998.

  12. Inondations et/ou coulées de boue

    Event from 09/06/1992 to 11/06/1992, order published in the Journal officiel on 16/01/1993.

  13. Inondations et/ou coulées de boue, Poids de la neige

    Event from 22/01/1992 to 25/01/1992, order published in the Journal officiel on 24/09/1992.

  14. Sécheresse

    Event from 01/05/1989 to 31/08/1989, order published in the Journal officiel on 23/04/2008.

  15. Tempête, Inondations et/ou coulées de boue

    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 1 of 5: very 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.

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

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

See cavities and ground movements on the map

Risk prevention plans

No risk prevention plan is listed for the commune.

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.