A "super" El Niño event unfolding on top of human-induced climate change is projected to cause over 450,000 additional heat-related deaths globally by February 2027, according to research by the Climate Impact Lab. The mortality projections, covering June 2026 through February 2027, come in addition to heat deaths caused by baseline global warming. This event is described as "Godzilla-level" due to its unprecedented severity.
Tropical nations such as Nigeria, Indonesia, Sudan, India, and Brazil are expected to bear the heaviest burden, alongside significant impacts across Southeast Asia and the African Sahel. The United States is also projected to suffer approximately 3,500 additional heat deaths. The study employed peer-reviewed methodology mapping temperature-mortality relationships across 24,378 global regions, comparing forward-looking climate forecasts against average baseline heat deaths recorded between 1996 and 2025.
The current El Niño event has caused planetary temperatures to surpass historic records several months ahead of the event's typical seasonal peak. Beyond extreme heat, the phenomenon is expected to amplify secondary disasters, including severe droughts, wildfires, and violent flooding. The World Food Programme has warned that these disruptions could push an estimated 50 million people into acute food insecurity as agricultural yields drop and food prices surge globally.
Researchers emphasize that because the projections map risks down to regional levels, governments can implement targeted, life-saving interventions immediately. Recommended mitigation strategies include deploying early heat warning systems, establishing cooling shelters, expanding emergency healthcare staffing, and instituting mandatory protections for outdoor workers. Professor Michael Greenstone, co-founder of the Climate Impact Lab, noted that the estimated 451,000 people is a large number made up of individuals with families and lives.
The extreme temperatures currently recorded provide a direct preview of baseline global temperatures expected within two decades if greenhouse gas emissions remain unchecked. Climate experts stress that while emergency response measures can reduce immediate casualties, long-term climate adaptation and emission reductions remain essential to avoid a permanent state of planetary crisis.
The study's findings highlight the urgent need for governments to take proactive measures to mitigate the impacts of the "super" El Niño event. By implementing targeted interventions, governments can reduce the number of heat-related deaths and minimize the effects of secondary disasters. The Climate Impact Lab's research aims to inform policy decisions and guide emergency response efforts.
As the global community prepares for the impending "super" El Niño event, experts emphasize the importance of addressing the root causes of climate change. Reducing greenhouse gas emissions and adapting to the changing climate are crucial steps towards mitigating the impacts of extreme weather events. The consequences of inaction will be severe, with far-reaching effects on human health, food security, and economic stability.
Key points
- Over 450,000 additional heat-related deaths are projected globally by February 2027 due to the "super" El Niño event.
- Tropical nations will bear the heaviest burden of the "super" El Niño event, with significant impacts across Southeast Asia and the African Sahel.
- Implementing targeted interventions, such as early heat warning systems and cooling shelters, can reduce the number of heat-related deaths.
