A major fire threatens the unique Fontainebleau forest massif

Fontainebleau – 13.07.2026: A major forest fire in the Forêt de Fontainebleau in the Seine-et-Marne department has, according to the latest information, affected around 800 hectares of the forest massif. On Monday afternoon, the fire was still not under control. According to the prefecture and emergency services, around 800 firefighters as well as substantial aerial support were involved in the operation. The situation remains dynamic, so figures on the affected area may continue to be updated.

The fire has struck a natural area of particular importance to Île-de-France. The state forests of Fontainebleau and Trois-Pignons together cover more than 20,000 hectares. The area lies southeast of Paris and combines extensive woodland with open heathland, sandstone formations, wetlands and dry biotopes. This diversity makes the massif one of the region’s most valuable natural areas.

The Office national des forêts, the state forestry authority, describes Fontainebleau as a biodiversity hotspot. The forest massif is part of the European Natura 2000 network of protected areas and belongs to the Fontainebleau and Gâtinais UNESCO Biosphere Reserve. Several biological reserves within the massif serve the long-term protection of habitats and species that are particularly sensitive to disturbance.

Its ecological importance is also due to its unusual landscape structure. Old oak and beech stands lie alongside pine areas, sandy heathland and the sandstone rocks typical of Fontainebleau. This mosaic creates different refuges for plants, insects, birds, bats and other wildlife. A major fire can therefore damage not only trees but also rare habitats that recover slowly.

At the same time, the forest is a popular recreational area located directly near the metropolitan region. Hiking trails, climbing areas and tourist attractions regularly draw visitors from Paris and across France. The proximity of transport routes and settlements increases the requirements for area closures, evacuation preparations and coordination of fire units in an emergency. Authorities have already closed parts of the area due to firefighting operations.

The current crisis also underlines that forest fires are now regarded as a permanent risk in Île-de-France. In April 2026, the state officially designated several municipalities and forest areas in the Seine-et-Marne and Essonne departments as zones with a particularly high fire risk. These include, among others, the Fontainebleau, Trois-Pignons, La Commanderie and Nemours-Poligny massifs.

In the coming days, the decisive question will be whether emergency services can fully halt the spread of the fire and which protected areas have been affected. Only after the situation has stabilized will authorities and the forestry administration be able to assess the extent of the damage to the forest, biodiversity and infrastructure. Until then, closures and official orders should be strictly observed so as not to hinder firefighting operations.