In a foundry, workers handle molten metal, far from the roadwork at the center of the investigation. This scene illustrates the risks linked to flying sparks. Credits: Volcanicaa / Wikimedia Commons, CC BY-SA 4.0.
On July 16, two workers from Aximum were formally charged. The proceedings concern the initial start of the forest fire in Fontainebleau. Sparks produced by a grinder during work on the A6 are believed to have ignited the vegetation. The courts still need to determine the chain of responsibility. Affected across some 2,000 hectares, the forest remains closed and under watch.
Two Formal Charges, One Manager Under Assisted Witness Status
The Fontainebleau prosecutor, Diane Ngomsik, confirmed to Agence France-Presse the formal charging of the two employees on July 16. They are accused of “involuntary destruction by fire […] through failure to comply with a safety or prudence obligation.” The charge concerns the first fire, which started four days earlier along the A6 highway. The origin was near Noisy-sur-École, in Seine-et-Marne.
The two men were released under judicial supervision. They are barred from contacting each other and must report in every two weeks, according to details provided by the prosecutor’s office. The company manager, also brought before the investigating judge, was placed under assisted witness status.
These decisions do not prejudge the outcome of the investigation. Under French law, Article 80-1 of the Code of Criminal Procedure requires serious or corroborating evidence. That evidence must make the person’s involvement in the facts plausible. A formal charge is neither a declaration of guilt nor proof that the worksite explains the full extent of the disaster.
The assisted witness status granted to the manager is less accusatory than a formal charge. It does, however, give him access to a defense and does not mean his role has been ruled out for good. Aximum’s procedural status as a legal entity remains uncertain in the most recent public information. Before the judge’s decision, announcements had referred to its appearance. The later confirmations concern only the two workers and the manager.
A Grinder At The Heart Of The Theory
On July 12, the two employees were working on A6 guardrails. They were cutting safety barriers with a gas-powered grinder, according to the initial details made public by the prosecutor’s office. The sparks produced on contact with the metal are believed to have reached the dry vegetation on the shoulder. The flames then reportedly spread quickly into the nearby forest.
This sequence is the starting hypothesis of the judicial investigation, not yet a definitive reconstruction. Experts must determine the exact origin of the first blaze and the fire’s path. They must also measure the share of that blaze in the roughly 2,000 hectares swept by the flames. The judge will compare the worksite schedule, the alert, and the spread. Those will be weighed against the weather conditions and the state of the vegetation.
The available information does not yet specify the instructions given to the workers or the firefighting equipment present. It also does not say whether a specific procedure governed this work that produced sparks. The identity of the contracting party and any subcontracting chain remain to be documented. The same goes for how responsibility is divided between the company, management, and the highway concessionaire.
What The Judicial Investigation Still Has To Establish
The criminal question is not simply whether the grinder produced sparks. Any possible fault and the safety or prudence obligation involved must be identified. The investigation must also determine who was responsible for enforcing it and establish the causal link with the damage. Article 322-5 of the Penal Code punishes involuntary destruction caused by fire. It provides for an aggravated offense in cases of a clearly deliberate violation of a specific safety or prudence obligation.
To establish such an aggravating circumstance, investigators will therefore have to go beyond mere alleged carelessness. They will need to determine which exact rule applied to the worksite and whether it was knowingly ignored. The fire-risk assessment, work instructions, and worker training may be examined. The choice of tool and the presence of monitoring or extinguishing equipment will be, too. Investigators could finally look into the response after the first sparks.
The Paris research unit and the Fontainebleau brigade are working with forensic identification technicians. Fire-cause specialists are assisting them. Their findings will have to distinguish the initial blaze from flare-ups and other fires observed in the forest. At this stage, no public conclusion makes it possible to attribute all the damage to a worker, the manager, Aximum, or the concessionaire. Their criminal liability remains to be established.
Distinct Fire Outbreaks, Separate Proceedings
The fire examined in the A6 worksite case started on July 12 near Noisy-sur-École. Two other outbreaks, occurring the next day in Arbonne-la-Forêt and Fontainebleau, fall under a different proceeding. Two 18-year-olds, including a volunteer firefighter, have been formally charged with destruction by fire and placed in pretrial detention. No public evidence links these two young men to Aximum’s workers.
This separation is essential, because the different investigations have often been grouped under the single label of the “Fontainebleau forest fires.” The charges, locations, and theories are not identical, however. The A6 case first concerns a fire presented as accidental. The other proceedings examine separate acts and possible intentional causes.
In another branch of the investigation, a 46-year-old man had been arrested in a parking lot in Fontainebleau. According to the prosecutor, he was released on July 17 for lack of corroborating evidence at this stage. The investigating judge is also still handling the case against an unknown person to examine possible intentional causes. These open investigations make it impossible to attribute every flare-up or burned area to the same triggering event.
Where Does The Fontainebleau Fire Stand Today?
As of July 17, around 2,000 hectares of the forest had been burned over by flames. The two main fires have been contained since July 14: their spread has stopped, but they are not yet considered extinguished. Overnight on July 16 to 17, a few flare-ups were dealt with quickly. About 950 firefighters were still deployed Thursday, with ground and air resources, to monitor the perimeter and douse smoldering stumps.
Shut down in an emergency on July 12 over about 12 miles, the A6 reopened on July 16 at 8 p.m. That information comes from the Seine-et-Marne prefecture. On part of the stretch, one lane remains reserved for emergency services in each direction, and the speed limit is 56 mph. A helicopter overflight ruled out, on Friday, any immediate risk of re-ignition near the route.
The danger has not disappeared inside the forest. Smoldering can persist below the surface, especially in soils rich in organic matter, before reappearing farther away. Trees whose roots have burned can also fall without warning. The National Forestry Office is therefore keeping closed the access roads and parking areas across Fontainebleau-Commanderie-Trois-Pignons. This measure remains in force until further notice.
The scale of the environmental toll will only be established once the forest is secured. Initial estimates amount to nearly one-tenth of the forest. They do not yet say which habitats will be able to regenerate naturally or which areas will need intervention. The length of the recovery effort is also still unknown. For now, the urgent priorities are twofold: prevent any flare-up and establish the sequence of events. The courts will have to do so without confusing the various proceedings opened after this extraordinary fire.