Floods, Gers and 6 other départements, May 2018
188 hectares of water detected by radar (Copernicus GFM, Sentinel-1)
8 protected animal species recorded within reach in the ten years before the flood
- Communes declared
- 91
- Dates per the orders
- 27 May to 2 June 2018
- Départements
- Gers, Lot-et-Garonne, Landes, Gironde, Haute-Garonne and 2 other départements
- Flood type
- river flooding, runoff or mudflow
- Heaviest rainfall
- 102 mm
- in one day (Aude, 30 May 2018), TERMES station · per Météo-France
- 25 May 2018: 1.6 mm
- 26 May 2018: 0 mm
- 27 May 2018: 0 mm
- 28 May 2018: 10 mm
- 29 May 2018: 0 mm
- 30 May 2018: 102 mm
- 31 May 2018: 0 mm
- 1 June 2018: 0 mm
- 2 June 2018: 0 mm
112 mm from 28 to 30 May, up to the wettest day
The flood's dates
- Peak discharge
- 150 m³/s
- L'Adour à Saint-Sever, on 4 June 2018 · provisional Hub'Eau value, it can be revised
- Extent
- water detected by radar (Copernicus GFM, Sentinel-1)
- 188 ha
Protected species recorded within reach
Observations recorded in the ten years before the flood, some known only to within a few kilometres, up to 10 km, when their published position is blurred or given by grid square. They tell which species were reported there, not what became of each animal.
13 species recorded within reach
8 protected animal species among them
6 Birds
2 Amphibians
The most notable protected animal species
Species with at least three observations (for a bird, three in the months that give it its category, and no bird without a record at the flood's season), the most threatened first, then the most recorded. An observation is a published record: it can count one or several animals, and the same animal can be noted several times. When their published position is imprecise, blurred or given by grid square, they are said to be "within reach or nearby".
Amphibians
Photos: Wikimedia Commons, each under its own licence (CC BY, CC BY-SA, CC0, public domain). Credit for each photo
In the water's path
Establishments registered today within reach of the flood, at their declared address or at the point Géorisques gives. They were not necessarily there on the day of the flood, and the dataset does not say whether they were flooded. An ICPE-classified farm can also be in the SIRENE register: these counts do not add up.
No ICPE-classified livestock farm located within the flood's reach
Géorisques · ICPENo livestock business in the SIRENE register based within the flood's reach
SIRENE register · InseeNo veterinary practice based within the flood's reach
SIRENE register · InseeNo animal protection association based within the flood's reach
National register of associationsNo wildlife association based within the flood's reach
National register of associations
A wildlife association is an association whose declared purpose in the national register of associations is the preservation of wildlife: the register does not say whether it runs an authorised care centre. Associations are counted at their declared address: an association or a care centre based outside the area can work across all of it.
Protected areas within reach
Area of each site within reach of the flood, and the share of the site it represents. Natura 2000 and regulatory protection first, then the ZNIEFF.
- Cours de la Gimone et de la MarcaoueZNIEFF type II (inventoried natural area)15 ha within reach0.5% of the site
- Prairies humides d'Aurimont et MontironZNIEFF type I (inventoried natural area)10 ha within reach17.0% of the site
- Prairies inondables de GimontZNIEFF type I (inventoried natural area)5 ha within reach4.5% of the site
A ZNIEFF is a wildlife inventory, with no regulatory protection.
The declared communes
91 communes declared a natural disaster (flood) for this flood, région by région, then département by département.
Nouvelle-AquitaineLot-et-Garonne, Landes, Gironde
Lot-et-GaronneSee the 28 communes
Argenton, Baleyssagues, Beauziac, Bouglon, Casteljaloux, Cocumont, Couthures-sur-Garonne, Damazan, Duras, Gaujac, Grézet-Cavagnan, Guérin, Houeillès, Lagupie, Leyritz-Moncassin, Marcellus, Meilhan-sur-Garonne, Montpouillan, Poussignac, Romestaing, Ruffiac, Saint-Martin-Petit, Saint-Sauveur-de-Meilhan, Saint-Sixte, Sainte-Bazeille, Sainte-Colombe-de-Duras, Samazan, Sauméjan
LandesSee the 13 communes
Amou, Bascons, Betbezer-d'Armagnac, Créon-d'Armagnac, Horsarrieu, Labastide-d'Armagnac, Lagrange, Mauvezin-d'Armagnac, Mazerolles, Saint-Cricq-Chalosse, Saint-Julien-d'Armagnac, Saint-Sever, Serreslous-et-Arribans
GirondeSee the 9 communes
Cours-de-Monségur, Dieulivol, Lamothe-Landerron, Mongauzy, Monségur, Roquebrune, Saint-Michel-de-Lapujade, Saint-Vivien-de-Monségur, Taillecavat
OccitanieGers, Haute-Garonne, Aude, Tarn-et-Garonne
GersSee the 32 communes
Ayguetinte, Beaumont, Biran, Cadeillan, Castillon-Debats, Céran, Condom, Dému, Escornebœuf, Gavarret-sur-Aulouste, Gimont, Goutz, Juilles, Lahas, Lalanne, Larroque-Saint-Sernin, Larroque-sur-l'Osse, Lauraët, Le Brouilh-Monbert, Miramont-Latour, Montestruc-sur-Gers, Montiron, Montréal, Mouchan, Pis, Polastron, Puycasquier, Saint-Caprais, Saint-Georges, Saint-Puy, Taybosc, Touget
Haute-GaronneSee the 5 communes
Beauchalot, Paulhac, Plaisance-du-Touch, Renneville, Villefranche-de-Lauragais
AudeSee the 2 communes
Baraigne, Montferrand
Tarn-et-GaronneSee the 2 communes
Castelsagrat, Dunes
This flood's data
In every file of the dataset, this flood carries the identifier EV-20180530-20180530-32-31050. Its dates were frozen when the identifier was created and differ here from the flood's.
The full dataset is released on 13 October at 6:00 (Paris time). Until then, we send it on request: presse@animalert.app.
Ask for the datasetpublic on 13 October at 6:00Recognised and listed
Public on data.gouv.fr on 13 October at 6:00
A project labelled by the French StateNational Resilience Day 2026 (Journée nationale de la résilience)
Registered with GBIFDerived dataset, DOI 10.15468/dd.ta4vkx