In addition to accidents, dropped cigarettes etc., The fires are being deliberately set.*
From Barron's, July 29:
The raging wildfires in France’s southwest region of Gironde have not only scorched some 162 square miles, displaced more than 250,000 people, and destroyed homes. They could also deal a blow to the prized Bordeaux wine region.
The Bordeaux wine industry is a significant economic engine for the region, employing about 50,000 people, both directly and indirectly, according to the Bordeaux Wine Council, a trade organization.
The wildfires were stabilized as of Wednesday morning, and about 57,000 people were permitted to return home from towns near the city of Bordeaux, according to an announcement from the Préfecture de la Gironde et de Nouvelle-Aquitane—the local office for the government in the city of Bordeaux. But Prefect Sophie Brocas cautioned in the update that an expected heat wave—with temperatures reaching 106 degrees—combined with dry winds means the situation remains risky.
“It is a very difficult moment for everybody in Gironde,” Marie-Catherine DuFour, technical director for the Bordeaux Wine Council, said in an email on Tuesday. “We all know people who have had to leave their homes, hoping to find them intact in a few days. It is very sad and we are all very anxious.”
DuFour praised the firefighters as well as farmers and winegrowers who were pitching in to help “with their tanks and their tractors.” In the organization’s view, the wildfires should only negatively impact the vineyards if they are 550 yards away, or almost a third of a mile. Currently they are about nine to 12 miles from the vines, according to the council. “We are not worried for the quality of the next vintage,” DuFour said.
There are reports that dense smoke and ash have blown into Bordeaux to various extents, particularly over Graves and Pessac-Léognan—home to the famous Bordeaux first-growth Château Haut-Brion, among other premier estates, according to a newsletter from Jane Anson, author of Inside Bordeaux, who lives in the city. The City of Léognan on Friday issued a warning to residents about “significant smoke and a strong smell of burning.”
The extent to which this smoke will affect the vineyards likely won’t be known until after the grapes are harvested and fermented. Variables that could affect the wines include the extent of smoke exposure, and whether it occurred after grapes began to ripen—a process that occurs at different stages for each type of grape.
The grapes of Cabernet, arguably the most valuable in Bordeaux, haven’t ripened yet, making them less susceptible to smoke, according to David Parker, CEO of the Benchmark Wine Group in Napa, Calif., and president of the National Association of Wine Retailers.
During the period between ripening and harvest, grapes can become coated with free volatile phenols—chemical molecules—that can penetrate grape skins. The grape attacks these molecules by attaching them with sugars. This bonding process removes the smoky aroma on the grape, but the bonds break during fermentation, releasing the volatile phenols when the wine is consumed, according to the Australian Wine Research Institute....
Notre pays traverse une saison de feux inédite : 116 085 hectares ont déjà brûlé et 13 566 départs de feu ont été recensés depuis janvier.
— Sébastien Lecornu (@SebLecornu) July 27, 2026
Nous avons déjà dépassé l’année record de 2022 (72 000 hectares brûlés).
La lutte contre les incendies commence par la prévention.
9 feux…
Continues:
Notre pays traverse une saison de feux inédite : 116 085 hectares ont déjà brûlé et 13 566 départs de feu ont été recensés depuis janvier.
Nous avons déjà dépassé l’année record de 2022 (72 000 hectares brûlés).
La lutte contre les incendies commence par la prévention.
9 feux sur 10 sont d’origine humaine et la plupart naissent d’une imprudence : un mégot, un barbecue, des travaux réalisés sans précaution.
Reporter un chantier, débroussailler son terrain, ne pas fumer près de la végétation : ces gestes simples sauvent des forêts, des maisons et des vies.
Mais tous ces feux ne sont pas des accidents. Certains sont allumés délibérément : c’est un crime, puni de 15 ans de réclusion criminelle. Depuis le 6 juillet, 162 interpellations ont déjà eu lieu.
Les forces de sécurité sont pleinement mobilisées pour identifier les incendiaires. Ils seront retrouvés, interpellés et répondront de leurs actes devant la justice.
9 out of 10 are human caused.
...not all these fires are accidents. Some are deliberately set: it is a crime, punishable by 15 years of criminal imprisonment...
...security forces have made 162 arrests related to wildfire offenses since July 6...
That's why you saw "As a side note, betting on wildfires and then setting one should be a capital crime - death penalty, no gray area, no recidivism." a week ago introducing"The risk of weather data sabotage is rising"
Related, the outro from February 2024's "European Wildfire Trends":
If interested in some historical comparisons see "When Europe Was Burning: The Multi-season Mega-drought of 1540 and Arsonist Paranoia" in Historical Disaster Experiences,
Pfister, C. (2017). When Europe Was Burning: The Multi-season Mega-drought of 1540 and Arsonist Paranoia. In: Schenk, G. (eds) Historical Disaster Experiences. Transcultural Research – Heidelberg Studies on Asia and Europe in a Global Context. Springer, Cham. https://doi.org/10.1007/978-3-319-49163-9_8They were rougher on arsonists than present-day Europeans are.


