Nigeria, India, Indonesia and Brazil are among the countries facing the greatest risks from ‘Super El Niño,’ with more than 370,000 additional heat-related deaths projected worldwide between October 2026 and March 2027. The planet is currently experiencing a historic climate emergency in the form of a ‘Super El Niño’ climate pattern. This pattern, compounded by global warming, is increasing the risk of dangerous heat worldwide.
The World Meteorological Organization (WMO) has warned that the event could be ‘unprecedented in strength.” Moreover, a newly launched predictive tool, the ‘El Niño Heat Mortality Tracker,’ is mapping the areas most affected by the extreme heat. Scientists estimate that El Niño could contribute to approximately 857,000 additional heat-related deaths between June 2026 and March 2027. Of these, approximately 373,000 are projected for October 2026 through March 2027.
The “Super El Nino” Phenomenon
The El Niño–Southern Oscillation (ENSO) is a naturally recurring climate cycle. It is characterized by shifts in ocean temperatures across the tropical Pacific. However, the current “Super El Nino” is extremely dangerous due to its interaction with ongoing global warming.
This weather pattern is triggered when ocean surface temperatures in the central and eastern equatorial Pacific become unusually high. During El Niño, the trade winds that normally blow from east to west weaken and may reverse. This shift disrupts normal atmospheric circulation. Therefore, some regions may experience severe droughts while others may face intense flooding, fierce winds, and heatwaves.
Estimated Heat-Related Deaths Since June 2026
Since the El Niño pattern emerged in June 2026, the tracker estimates that heat-related deaths have increased worldwide. The tracker estimates that approximately 484,500 additional heat-related deaths occurred worldwide between June and September 2026. The estimated death toll so far has been heavily concentrated in developing nations with dense populations.
For instance, India is estimated to have been the hardest-hit nation so far, with more than 100,000 additional heat-related deaths. China has suffered an extra 85,400 deaths due to elevated summer temperatures. Sudan and Indonesia have reported 38,500 and over 20,000 additional fatalities respectively. Several European countries are also estimated to have experienced a significant increase in heat-related deaths. This includes 7,200 deaths in Italy, 4,800 in France, 2,500 in Germany, and 2,300 in Spain. Similarly, the tracker estimates 820 additional heat-related deaths in the UK.
Intervention Measures
The research team at the Climate Impact Lab has indicated that the primary goal of publishing these stark numbers is to use data to help save lives. The tracker provides monthly data projecting risks up to six months ahead. It gives international aid agencies and local governments a roadmap to prepare before extreme heatwaves arrive.
Key preventive measures outlined by researchers include early warning systems, such as local text messages and broadcast alerts. Vulnerable nations are advised to expand healthcare access and stockpile intravenous fluids. Moreover, facilities such as public cooling centers and clean water distribution points are also recommended.
