Super El Niño Projected To Cause Over 450,000 Global Deaths By Early 2027

More than 450,000 additional heat-related deaths are projected globally by February 2027 as a result of an unprecedented “super” El Niño event unfolding on top of human-induced climate change, according to new research by climate scientists at the Climate Impact Lab.

The mortality projections—covering the period from June 2026 through February 2027—come in addition to heat deaths caused by baseline global warming. Researchers warn that elevated mortality rates are likely to persist through mid-2027, with tropical nations such as Nigeria, Indonesia, Sudan, India, and Brazil bearing 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 estimate of 451,000 people is such a large number that it can be numbing, but it is made up of parents and children, grandparents and neighbours, people going to work, caring for families, and living their lives,” noted Professor Michael Greenstone, co-founder of the Climate Impact Lab and professor at the University of Chicago.

Scientists describe the current El Niño as “Godzilla-level,” noting that planetary temperatures surpassed 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.

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. Researchers emphasized 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.

According to the research team, 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.