Haute-Marne

Recorded Natural Hazards (Géorisques)

It has 426 municipalities and 168,331 inhabitants. Under the seismic zoning in force since 2011, its highest seismicity is low (zone 2 of 5). A natural disaster has been declared 1,777 times since 1982 (one declaration per municipality and decree), mostly for floods (1,129) and ground movements (419). The most recent was signed on 18 January 2026. 1 municipalities have a high radon potential (category 3), home to 0% of inhabitants. 28 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

• 1999Floods and Mudflows · 25 December 1999417 municipalities
• 1999Ground Movements · 25 December 1999417 municipalities
• 1983Floods and Mudflows · 1 April 1983152 municipalities
• 1982Floods and Mudflows · 8 December 198298 municipalities
• 1983Floods and Mudflows · 25 May 198379 municipalities
• 2019Drought (Clay Shrinkage) · 1 July 201953 municipalities

Most Frequently Affected Municipalities

• 15Saint-Dizier
• 14Éclaron-Braucourt-Sainte-Livière
• 12Eurville-Bienville
• 12La Porte du Der
• 11Châteauvillain
• 11Chaumont
• 11Chevillon
• 11Wassy

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