Seine-et-Marne

Recorded Natural Hazards (Géorisques)

It has 507 municipalities and 1,468,108 inhabitants. Under the seismic zoning in force since 2011, its highest seismicity is very low (zone 1 of 5). A natural disaster has been declared 4,063 times since 1982 (one declaration per municipality and decree), mostly for floods (2,603) and drought (868). The most recent was signed on 8 July 2025. 162 municipalities are covered by an approved natural hazard prevention plan.

Seismicity Zones

Number of municipalities in each zone of the regulatory seismic zoning (from 1, very low, to 5, high).

Natural Disasters Declared Since 1982

Declarations per five-year period.

Most Widespread Events

• 1999Ground Movements · 25 December 1999507 municipalities
• 1983Floods and Mudflows · 1 April 1983507 municipalities
• 1999Floods and Mudflows · 25 December 1999507 municipalities
• 1982Floods and Mudflows · 8 December 1982194 municipalities
• 2016Floods and Mudflows · 28 May 2016138 municipalities
• 1995Floods and Mudflows · 17 January 199579 municipalities

Most Frequently Affected Municipalities

• 30Crécy-la-Chapelle
• 27Esbly
• 26Pommeuse
• 25Chelles
• 25Condé-Sainte-Libiaire
• 25Pomponne
• 24Coulommiers
• 24Coupvray

Hazards Listed by Municipality

Number of municipalities exposed to each natural hazard according to the departmental major risks file.

Hazards at a specific address on Géorisques