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A major flood · 2023

Floods, Gers and 6 other départements, June 2023

GersTarn-et-GaronnePyrénées-AtlantiquesLot-et-GaronneLandesLotHautes-Pyrénées
In blue, the communes declared for this flood: this blue is not the water. In white, the water detected by radar (Copernicus GFM, Sentinel-1). Hover over a département to read its name. Map: Animalert, from GASPAR (Géorisques), Copernicus EMS, Global Flood Monitoring (© European Union) and IGN ADMIN EXPRESS. Contains modified Copernicus Emergency Management Service information (2026)

  • 124 hectares of water detected by radar (Copernicus GFM, Sentinel-1)

  • 28 protected animal species recorded within reach in the ten years before the flood

  • 1 animal species threatened on the national Red List, protected or not

    birds: by their population in the flood's season
Communes declared
195
Dates per the orders
19 to 22 June 2023
Départements
Gers, Tarn-et-Garonne, Pyrénées-Atlantiques, Lot-et-Garonne, Landes and 2 other départements
Flood type
river flooding, runoff or mudflow
Heaviest rainfall
101.2 mm
in one day (Lot, 20 June 2023), MONTCUQ - ROUIL station · per Météo-France
  1. 15 June 2023: 0.2 mm
  2. 16 June 2023: 0 mm
  3. 17 June 2023: 6 mm
  4. 18 June 2023: 4.4 mm
  5. 19 June 2023: 2.8 mm
  6. 20 June 2023: 101.2 mm
  7. 21 June 2023: 5.2 mm
  8. 22 June 2023: 0.2 mm
  9. 23 June 2023: 0 mm

108.4 mm from 18 to 20 Jun, up to the wettest day

The flood's dates

Peak discharge
616 m³/s
La Garonne à Agen, on 22 June 2023 · provisional Hub'Eau value, it can be revised
Extent
water detected by radar (Copernicus GFM, Sentinel-1)
124 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.

  • 41 species recorded within reach

  • 28 protected animal species among them and 2 protected plants

  • 1 animal species threatened on the national Red List, protected or not (vulnerable, endangered or critically endangered)

  • 20 Birds

  • 4 Mammals, bats included

  • 2 Insects

  • 1 Reptiles

  • 1 Amphibians

For birds, the category is the one of their population at the flood's season (breeding, wintering or passage birds): a bird with no dated record within reach in that season in the GBIF data has none, and the breeding category needs at least two dated records in June or July. In the migration season (March, August to October), a bird that neither the passage list nor the wintering list assesses takes its breeding category only if it was recorded at least twice within reach in June or July. The list used is named under each species.

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".

Insects

  • Fadet des LaîchesFadet des Laîches

    Coenonympha oedippusRed List: near threatened
    3 observations within reach or nearby

Reptiles

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 · ICPE

  • No livestock business in the SIRENE register based within the flood's reach

    SIRENE register · Insee

  • No veterinary practice based within the flood's reach

    SIRENE register · Insee

  • No animal protection association based within the flood's reach

    National register of associations

  • No 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.

The declared communes

195 communes declared a natural disaster (flood) for this flood, région by région, then département by département.

Download this flood's data

In every file of the dataset, this flood carries the identifier EV-20230620-20230622-32. Its dates were frozen when the identifier was created and differ here from the flood's.

Download the datasetdata.gouv.fr

Recognised and listed