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A major flood · 2018

Floods, Mayenne and 7 other départements, June 2018

MayenneIlle-et-VilaineSartheMaine-et-LoireOrneMorbihanLoire-AtlantiqueCôtes-d'Armor
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). In coral, the Natura 2000 sites and those under regulatory protection, in bright coral their part within that area. 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)

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

  • 141 hectares in Natura 2000 or under regulatory protection

    66% of the observed flooded area

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

Communes declared
81
Dates per the orders
9 to 15 June 2018
Départements
Mayenne, Ille-et-Vilaine, Sarthe, Maine-et-Loire, Orne and 3 other départements
Flood type
river flooding, runoff or mudflow
Heaviest rainfall
111.1 mm
in one day (Sarthe, 9 June 2018), BONNETABLE station · per Météo-France
  1. 4 June 2018: 10.2 mm
  2. 5 June 2018: 8.4 mm
  3. 6 June 2018: 8.9 mm
  4. 7 June 2018: 0 mm
  5. 8 June 2018: 0.4 mm
  6. 9 June 2018: 111.1 mm
  7. 10 June 2018: 0 mm
  8. 11 June 2018: 91.9 mm
  9. 12 June 2018: 0 mm

111.5 mm from 7 to 9 Jun, up to the wettest day

The flood's dates

Peak discharge
304 m³/s
La Mayenne à Château-Gontier, on 12 June 2018 · per Hub'Eau
Extent
water detected by radar (Copernicus GFM, Sentinel-1)
213 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.

  • 165 species recorded within reach

  • 2 protected animal species among them and 1 protected plant

  • 2 Birds

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.

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.

A ZNIEFF is a wildlife inventory, with no regulatory protection.

The declared communes

81 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-20180609-20180609-53. Its dates were frozen when the identifier was created and differ here from the flood's.

Download the datasetdata.gouv.fr

Recognised and listed