Record winter rainfall triggers bloom across 17,000 square kilometres of Chile's Atacama Desert
Winter storms driven by a strong El Niño pattern have covered up to 17,000 square kilometres of Chile's Atacama Desert in over 200 species of wildflowers, marking the largest flowering event in the region since 1997.
The blooming desert
The Atacama Desert in northern Chile, stretching approximately 1,600 kilometres along the Pacific coast between the ocean and the Andes, is undergoing a widespread flowering event known as the Desierto Florido. Following winter precipitation, millions of dormant seeds, bulbs, rhizomes, and tubers have sprouted across brown rocky dunes. Chilean forestry authority CONAF estimates that between 15,000 and 17,000 square kilometres are now covered in carpets of purple, yellow, white, and red wildflowers. The area matches the scale of the Santiago Metropolitan Region. Officials note that this event represents the most expansive desert bloom recorded since 1997, featuring more than 200 plant species.
Botanical diversity and dormant seeds
The plant cover includes endemic species such as red and yellow Añañucas, white Suspiros, purple Portulaca varieties, and the Garra de León, known locally as the lion's paw. Seeds and subterranean plant parts remain dormant beneath the arid soil through prolonged dry spells until triggered by sufficient winter rain, moisture, and temperature changes. CONAF officials reported that vegetation has appeared on hills and mountain ranges that had shown no plant growth for three to four decades.
Jorge Carabantes of the National Forest Corporation described the unique botanical scale of the event.
It is a unique phenomenon; there are over 200 plant species. This is an obviously extraordinary and unusual flowering event, very different from other blooms that occur in other parts of the globe.
Winter rainfall and El Nino weather systems
The flowering followed winter rain between July and August, when several Chilean regions recorded rainfall levels not seen since record-keeping began in the 1950s. Chilean meteorological service DMC identified the period between 14 and 21 July as one of the most significant July rain events in decades, driven by three consecutive frontal systems linked to an atmospheric river. Rainfall volumes reached between 160 and 190 millimetres in select locations across northern Chile. Biologists attribute the intense storms to a strong El Niño pattern, which warms sea surfaces in the tropical Pacific.
César Pizarro from CONAF Atacama detailed the measurement records that enabled the widespread vegetative response.
Since rainfall began to be recorded, these are the most significant figures in terms of volume: 160, 180, 190 millimetres in some locations. What happened now has an origin and it is called super El Niño.
- CONAF records previous peak bloom extent in the Atacama Desert
- Three frontal systems driven by an atmospheric river trigger record winter rainfall
- Wildflower bloom reaches peak density across northern Chilean national parks
- Expected conclusion of the flowering season across desert parks
- Projected end of the global El Nino cycle and associated extreme heatwaves
Tourism and global climate effects
CONAF director Aida Baldini Urrutia stated that the flowering reached its peak in October and will continue through late November. The forestry agency expects approximately one million domestic and international tourists to visit affected conservation areas, including the Desierto Florido, Llanos de Cháyes, and Pan de Azúcar national parks. While the rains generated botanical growth in the northern desert, winter storm fronts also caused localized flooding in other parts of Chile. The World Meteorological Organization noted that the El Niño event typically spans nine to twelve months, peaking between November and February, while researchers at the Climate Impact Lab project that associated worldwide heat extremes could cause 450,000 heat-related deaths globally through late February 2027.
