A rapid attribution study published on August 6, 2026, found that climate change has made extreme wildfire conditions like those in Canada this year at least twice as likely. The study, conducted by an international team of scientists, analyzed the 2026 fire season, which has already seen over 3.8 million hectares burned across the country.
The researchers compared current climate conditions with a pre-industrial baseline, using climate models and historical data. They concluded that human-induced warming increased the probability of fire-conducive weather—characterized by high temperatures, low humidity, and strong winds—by a factor of two to three. The study has not yet been peer-reviewed but follows established attribution methodologies.
Canada's 2026 wildfire season has been among the most severe on record, with fires forcing evacuations in several provinces and causing widespread smoke that reached the United States. The area burned is more than double the 10-year average for this time of year, according to the Canadian Interagency Forest Fire Centre.
Scientists emphasize that while natural variability plays a role, the trend is clear: a warmer atmosphere dries out vegetation and extends the fire season. The study's lead author, Dr. Sarah Kew from the Royal Netherlands Meteorological Institute, said, "We are seeing a clear fingerprint of climate change in these extreme fire events."
As the world continues to warm, such extreme fire seasons are projected to become more frequent, underscoring the urgent need for adaptation and emission reductions.
