Record-breaking Pacific warming expected to trigger unprecedented Amazon drought and wildfire surge
A powerful El Niño event is developing, with Pacific sea-surface temperatures far above normal and still rising. Forecasts indicate a severe rainfall deficit over the Amazon by January, heightening wildfire risks in a region already near a climate tipping point. Previous strong El Niños have caused massive tree loss and carbon emissions in the rainforest.
The ongoing El Niño is tracking to be the strongest ever recorded, with Pacific temperatures already exceeding typical thresholds and continuing to climb. This event's heat is positioned unusually close to South America, which intensifies its regional effects, particularly the suppression of rainfall over the Amazon basin.
Historical precedents show the severe consequences of such events. The 2015-16 El Niño triggered massive forest fires that killed billions of plants and released hundreds of millions of tonnes of carbon. Current data already shows rainfall deficits and elevated temperatures in the Amazon, creating a feedback loop where dry conditions worsen heat, potentially pushing the ecosystem toward a permanent shift to savannah.
A severe Amazon drought could have wide-reaching societal effects. Local communities and indigenous populations may face water scarcity, crop failures, and health risks from wildfire smoke. Globally, a massive release of stored carbon from dying trees could accelerate climate change, affecting weather patterns and agricultural yields worldwide. Furthermore, the potential collapse of the rainforest into savannah would represent a permanent loss of biodiversity and a critical carbon sink, potentially altering regional rainfall cycles that support agriculture across South America.