RESOLVING THE LEDGER
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PARIS — Wildfires raging west of the French city of Bordeaux are threatening a number of France’s key defense-industrial sites, including an ArianeGroup facility that produces propulsion components for the M51 submarine-launched ballistic missile, Dassault Aviation’s final assembly line for the Rafale fighter jet, and one of Roxel’s main manufacturing sites for solid rocket motors used in MBDA missiles.
Dassault Aviation said it was moving sensitive equipment from a site closest to the wildfires to one nearer Bordeaux, with most workers staying home in line with instructions issued by the authorities. ArianeGroup had evacuated its affected sites, while the French Atomic Energy Commission CEA closed its military nuclear research site near Bordeaux as the wildfires approached.
The Gironde department of southwest France has been battling one of the country’s largest wildfires on record, with over 100,000 acres burned — an area roughly four times the size of Paris. The fires in recent days approached the cluster of defense and aerospace sites west of Bordeaux that represents one of France’s most important concentrations of missile, propulsion, combat aircraft, and military electronics production.
Dassault Aviation had to move “a certain number of sensitive equipment” from its site in Martignas and a logistics center in Cestas to its site in Mérignac and the local Air Base 106, working in close cooperation with France’s Directorate General for Armament and local authorities, the aircraft maker said in an emailed statement late Monday.
Satellite data on Tuesday morning showed wildfires remained active less than 9 kilometers (5.6 miles) west of Dassault’s Martignas site, which is the wing assembly plant for the Rafale jet, before final assembly of the aircraft in Mérignac.
NASA’s Fire Information for Resource Management System showed fires and hot spots west of Bordeaux were significantly reduced as of 9 o’clock in the morning local time, though authorities have warned that a new wave of hot weather with a peak on Wednesday, combined with near-record drought conditions, could cause fire activity to pick up again.
Employees at the Mérignac and Martignas plants are staying home, in line with instructions issued by authorities, unless they’ve been evacuated, Dassault Aviation said. Those still working are the teams necessary for the transfer of equipment and those in charge of protecting the site to help with fire-fighting efforts, the company said.
ArianeGroup is working in close cooperation with local and national authorities, and the company’s sites west of Bordeaux “have been evacuated, and all necessary measures have been taken to secure them,” the space-launch company said in an emailed reply to questions. The firm said it’s not commenting on security measures around its sites.
Satellite data as of Tuesday morning showed active wildfires around 12 kilometers west of ArianeGroup’s Candale site, where the propulsion units of the M51 missile stages are integrated and assembled, around 13 kilometers from the site of Saint-Médard-en-Jalles where the missile is fueled, and some 16 kilometers of the Le Haillan site that produces the company’s solid-propulsion systems.
“Whilst the unprecedented forest fires in Gironde are above all an environmental and humanitarian disaster, they also threaten sites that are of vital strategic importance to our nuclear deterrent,” said Etienne Marcuz, an associate fellow at the Foundation pour la Recherche Stratégique, in a post on the social media network X on Sunday.
☢️🇫🇷 Les incendies en Gironde et la dissuasion nucléaire 🇫🇷☢️ Si les incendies de forêt sans précédent en Gironde constituent avant tout une catastrophe environnementale et humaine, ils menacent également des sites hautement stratégiques pour notre dissuasion nucléaire. Selon… pic.twitter.com/9v18gQAzYu
— Etienne Marcuz (@Etienne_Marcuz) July 26, 2026 Emergency services aided by local construction companies worked during the night of Friday to Saturday and throughout the day to clear vegetation and create firebreaks around a number of sensitive sites, Gironde department Prefect Sophie Brocas said in a press conference on Saturday.
Marc Vermeulen, the head of the Gironde department fire and emergency service, said that after protecting lives, the next priority is protecting at-risk strategic sites. The DGA has a missile testing site just west of Saint-Médard.
Thales said its site at Mérignac has been closed since Monday as a precautionary measure, in accordance with guidelines from the authorities. The company said it’s doing everything possible to safeguard its strategic equipment at the site and ensure continuity of its commitments to customers.
The Thales site sits across from the Dassault Aviation campus in the Bordeaux suburb, and supplies equipment including avionics systems for the Rafale as well as military helicopters.
MBDA’s Roxel unit has one of its main production locations in Saint-Médard, where it produces propellant, solid rocket motors and carries out integration work for rockets and drones, on a site shared with ArianeGroup. Roxel produces the motors for a number of MBDA missiles, including the Aster range of air-defense interceptors.
“Roxel is managing the situation and the necessary measures have been taken to ensure the safety of our staff and our operations, with the support of the relevant authorities and emergency services,” MBDA said in an emailed statement, declining further comment.
The CEA said its site in Le Barp southwest of Bordeaux has been closed due to the wildfire situation. After wildfires in 2022, the center put in place new procedures, provided additional fire-fighting equipment to the in-house fire brigade, and created firebreaks around the center, the government organization said in an emailed reply to questions.
The CEA Cesta site houses the organization’s megajoule laser, a research instrument used to create conditions of extreme h...
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