Forest fire burns 100 hectares in Ardennes, several hundred more threatened near Belgian border

Fire breaks out near Belgian border

A forest fire broke out on the morning of Saturday, 15 August 2026, in Monthermé, in the French Ardennes department, close to the Belgian border. Firefighters from the Ardennes fire and rescue service have been mobilised since late morning on the blaze. By mid-afternoon, approximately 10 hectares had burned, with "several hundred" additional hectares described as "threatened" by the prefecture. The Ardennes firefighters reported in the early afternoon that they were engaged "with numerous means and personnel" and that "a significant smoke is emanating from the site" with "a plume visible as far as Charleville-Mézières."

Difficult terrain hampers response

The prefecture described the situation as "unfavorable" and later "extremely unfavorable," citing a zone that is "very steep on an ascending slope." The area is also a "sector without water," forcing fire engines to be supplied by pumping water from the Meuse river at a port in the commune, located more than 10 kilometres from the forest massif where the fire started. At 18:30, firefighters stated that the fire was in free propagation and continued to evolve.

The fire is in free propagation and continues to evolve.

The combination of steep terrain and the absence of a local water source has complicated the ground response, with engines dependent on a distant river pumping point.

Reinforcements and aerial support

A Dash Milan aircraft was mobilised from 16:30, initially for visual reconnaissance to assist ground crews. It later carried out retardant drops: two drops at 16:30 and 18:00 according to the prefecture, with a total of four drops completed by the evening per a later communiqué published after 20:00. Firefighters from the Meuse and Marne departments arrived as reinforcements, and additional crews from the Aisne, Somme, and Nord were expected around 21:30. A gendarmerie helicopter from Metz was also due to arrive in the early evening. The gendarmerie nationale is securing access and the work of the firefighters, who are also being assisted by local farmers. The festival hall of Monthermé has been made available for the firefighters' recovery.

Escalating damage through the evening

The burned area grew rapidly through the afternoon and evening. From approximately 10 hectares in mid-afternoon, the toll reached 25 hectares by 18:30, and approximately 100 hectares by the evening, according to a prefecture communiqué published after 20:00. Firefighters were operating on three fronts by early evening, after having been on two fronts earlier in the afternoon, one of which was adjacent to a hamlet. A portion of departmental road 989 was closed to traffic to facilitate operations.

At 18:30, the firefighters' situation report counted 120 personnel engaged, while the prefecture's later communiqué indicated 90 firefighters mobilised on site at around 20:00. Firefighters were intervening "without interruption" on three flanks of the fire at that hour.