Bas-Rhin

Recorded Natural Hazards (Géorisques)

It has 514 municipalities and 1,163,810 inhabitants. Under the seismic zoning in force since 2011, its highest seismicity is moderate (zone 3 of 5). A natural disaster has been declared 3,033 times since 1982 (one declaration per municipality and decree), mostly for floods (2,158) and ground movements (715). The most recent was signed on 19 January 2025. 78 municipalities have a high radon potential (category 3), home to 8% of inhabitants. 208 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 1999513 municipalities
• 1999Ground Movements · 25 December 1999513 municipalities
• 1983Floods and Mudflows · 1 April 1983318 municipalities
• 1982Floods and Mudflows · 8 December 1982242 municipalities
• 1983Ground Movements · 22 May 1983192 municipalities
• 1983Floods and Mudflows · 22 May 1983192 municipalities

Most Frequently Affected Municipalities

• 19Marlenheim
• 17Haguenau
• 16Strasbourg
• 15Harskirchen
• 15Truchtersheim
• 15Wasselonne
• 14Eschbourg
• 14Herbitzheim

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