The scale of the event is unprecedented in recent records. César Pizarro, a biologist with CONAF Atacama, stated that some locations received between 160 and 190 millimeters of rain, representing the largest volumes since records began. These figures mark a significant departure from the norm; some parts of the Atacama typically receive only a few millimeters of rain annually, while others have never recorded rainfall at all. The sudden availability of water allows short-lived plant species to grow rapidly, creating a temporary but vivid carpet of vegetation across the rocky landscape.
This rainfall followed a series of unusual winter weather patterns in August 2026, when back-to-back storms brought snowfall to northern Chile, extending from the Andes to near the Pacific coast. NASA satellite imagery captured snow covering the Chajnantor plateau and areas near the port city of Antofagasta. Atmospheric scientist René Garreaud of the University of Chile noted that the late-August storm originated from an unusually large trough, producing precipitation that spanned an unusually wide swath of the region. In the coastal town of Taltal, nearly 40 millimeters of rain fell in three days, approximately ten times the annual mean. While these earlier events caused mudflows and flash flooding, the subsequent sustained moisture has fueled the current botanical explosion.
Scientists have documented similar, though smaller, greening events in the past. A 2019 study published in the International Journal of Applied Earth Observation and Geoinformation by Roberto O. Chávez and colleagues used satellite data from 1981 to 2015 to identify 13 such events, most starting in winter. The 2026 bloom is distinguished by its combination of wide coverage and high intensity. The phenomenon occurs because the Atacama’s hyper-arid conditions, driven by the Andes rain shadow and cold ocean currents, leave the soil primed for rapid biological response when moisture finally arrives.
The environmental spectacle is now a major economic driver. Data from Chile’s National Tourism Secretariat indicates the Atacama region is expected to see nearly 300,000 overnight trips by the time the bloom fades. While the 17,000-square-kilometer coverage figure is an estimate and the intensity projection is subject to final verification, the visual impact is already confirmed by satellite observation and on-the-ground reports. The event highlights the region’s extreme climatic variability, where years of extreme drought can be followed by short-lived periods of intense ecological activity.
