Human-caused climate change played a significant role in the devastating wildfires that swept across Chile and Argentina’s Patagonia region last month. According to World Weather Attribution, the extreme heat and dry conditions that fueled the fires were made up to three times more likely due to global warming.

In Chile’s Biobío and Ñuble regions, the fires killed 23 people, destroyed more than 1,000 homes and forced mass evacuations. In Argentina, flames tore through over 45,000 hectares, including parts of Los Alerces National Park, a UNESCO World Heritage site home to ancient forests.

Researchers found that reduced rainfall, prolonged drought and record-breaking temperatures created a dangerous environment where vegetation became highly flammable. Seasonal rainfall was up to 25% lower than it would have been without rising global temperatures.

While many fires were sparked by human activity or lightning, scientists say climate change dramatically increased the risk and severity of the disaster. They warn that as fossil fuel emissions continue, wildfire conditions across Patagonia will likely become even more frequent and destructive in the years ahead.