Fires Rage in Patagonia (original) (raw)

Smoke streaming from a fire is visible in this satellite image of a green forested area of Argentina and Chile.

In February 2025, multiple fires raged along the eastern slopes of the Andes Mountains in Patagonia. The fires had burned about 30,000 hectares (115 square miles) of forest in south-central Argentina by February 11, forcing hundreds of people to evacuate their homes, according to news reports.

Smoke from the Magdalena Valley fire—burning in Lanín National Park—was visible in this image, captured by the MODIS (Moderate Resolution Imaging Spectroradiometer) instrument on NASA’s Aqua satellite on February 9, 2025 (above). A detailed view of the smoke moving through the Magdalena Valley can be seen in the image below, acquired on the same day by the OLI-2 (Operational Land Imager-2) on Landsat 9.

The Magdalena Valley fire ignited in late January and had charred more than 15,000 hectares (58 square miles) of Lanín National Park as of February 10. The forested park, located in Argentina, shares a border with Villarrica National Park in Chile. Both parks share the two snowcapped dormant volcanoes pictured here: Lanín and Quetrupillán.

Satellite image of white smoke filling the valleys of a mountainous region of central Argentina. Two snow-capped dormant volcanoes can be seen in the lower part of the image.

The austral summer (December through February) is the dry season in Chile and Argentina when wildfires are more common. This year, strong winds and unusually high temperatures fueled the region’s blazes, which began in December 2024.

Warm, dry wind from the west crossed the Andes and swept through Lanín National Park at speeds up to 45 kilometers (28 miles) per hour in early February. As the wind flowed down the lee side of the Andes, it compressed, increasing the air temperature and driving down humidity. A similar phenomenon occurs during the Chinook Winds, which flow down the east side of the Rocky Mountains.

René Garreaud, an atmospheric scientist at the University of Chile, noted that westerly winds crossing the Andes were stronger than average from early January to early February.

Central and northern Argentina were especially hot in January and early February 2025. Maximum temperatures hovered around 35-45 degrees Celsius (95-113 degrees Fahrenheit), which is 3-5°C above normal, according to Argentina’s national weather service. The weather service noted that these “extreme temperatures” were expected to persist in parts of the country until February 12.

Two other fires burned south of the Magdalena Valley fire in Argentina on February 11. By that day, the Los Manzanos fire had scorched 10,000 hectares of the Nahuel Huapi National Park, according to officials, and the Confluencia fire had burned over 3,600 hectares near the town of El Bolsón.

NASA Earth Observatory images by Michala Garrison, using Landsat data from the U.S. Geological Survey and MODIS data from NASA EOSDIS LANCE and GIBS/Worldview. Story by Emily Cassidy.