A newly released Climate Impact Lab report projects that more than 450,000 people worldwide could die from excessive heat due to the current Super El Niño. The phenomenon has already surpassed previous temperature benchmarks months before its expected peak.
Global land temperatures are projected to climb 1.2°C/2.1°F above normal in the coming months as a powerful Super El Niño continues to warm the planet. Climate scientists warn that the current event, which began in June, is pushing global weather systems into conditions that won't be the norm for another two decades.
The natural climate phenomenon involves warming ocean surface temperatures that influence global circulation, triggering extreme weather worldwide, including severe droughts, floods, and violent storms.
Global Death Toll Projections Through February 2027
Researchers calculate that roughly 451,000 lives will be lost due to heat, with the Climate Impact Lab stating in just the next six months alone, this will include 239,000 deaths across the globe. Elevated mortality risks may potentially persist through June or July of next year.
The projections are built on peer-reviewed methods that cross-examine historical relationships between monthly temperatures and heat mortality across 24,378 regions worldwide, factoring in the forecasted temperature spikes. While the report has not yet completed peer review, co-author Michael Greenstone of the University of Chicago and the Climate Impact Lab emphasized that releasing the findings early is vital given the immediate public health urgency.
Tropical countries and developing regions are expected to bear the brunt of the temperature surges. Southeast Asia and the Sahel region of Africa are similarly designated as high-risk zones.
Specific regional breakdowns outline hundreds of thousands of individuals facing severe risk. Meanwhile, the United States is counted among the 20 nations facing the highest additional heat mortality, with about 3,500 deaths tied to the extra heat.
Governments can use these regional projections to target vital countermeasures, according to researchers. Recommended interventions include expanded heat forecasts, accessible cooling centers, deployed medical personnel during severe temperature spikes, and stronger protections for outdoor workers.
Meteorological institutions confirm that the current cycle has shattered past records well before reaching its peak, with the most recent Met Office statement noting the current event has surpassed all previous benchmarks. Adam Scaife, head of long-range prediction at the UK Met Office, noted that experts had signaled for months that the event would prove an unprecedented event. The Met Office also warns that the climate pattern will introduce wetter, stormier conditions to the United Kingdom through autumn and early winter, alongside heightened risks of sudden cold snaps.
Photo: Tempo
The fact that it has already exceeded previous records – with several weeks to go before it peaks later this year – shows the enormity of this El Niño.
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Adam Scaife, head of long-range prediction at the Met Office
In North America, state leaders are already moving to counter severe weather threats. California Governor Gavin Newsom declared an official state of emergency ahead of a dangerous storm season carrying heavy rains, high winds, mountain snow, landslides, and coastal flooding.
We are preparing for this El Niño early because every Californian deserves to be safe in their home, connected to their community, and protected when severe weather comes.
Gavin Newsom, Governor of California
Beyond immediate heat mortality, international bodies warn of cascading hazards. The World Food Programme cautioned that the phenomenon could drive up food prices and push roughly 50 million people into acute hunger. While historical analogues like the severe El Niño of 1877–1878 caused widespread famine and massive casualties under entirely different conditions, scientists emphasize that merging El Niño shocks with a permanently warmer global baseline heightens modern risks to global food supplies, water availability, and public health.
