A research report from the University of Chicago's Climate Impact Lab projects that this year’s El Niño could cause nearly 451,000 additional heat-related deaths worldwide by February 2027 compared to a typical year. The study, released on September 23, 2026, indicates the highest death tolls will occur in poorer countries already facing challenges like food insecurity and high energy costs due to climate change and conflicts. Poorer regions lack access to resources such as air conditioning and reliable healthcare systems that wealthier areas have.
Written locally by qwen2.5:14b on 2026-09-23,
using this article's own text rather than the other coverage of the
same event (that is the story summary below).
This year's powerful El Niño and the record global heat it's driving, along with severe droughts, wildfires and shrinking water supplies, could lead to nearly half a million more deaths worldwide by the end of February, according to a research report released Wednesday (September 23, 2026).
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it → drive → report
The grim warning by the University of Chicago-based Climate Impact Lab says that as many as 451,000 more heat-related deaths between June and the end of February could be attributed to El Niño, compared with heat deaths expected in a typical year.
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deaths → base → year
The heaviest toll, the group says, is expected in poorer countries, already struggling with food insecurity and high energy costs, partly due to climate change and the fallout of the war in Iran.
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group → say → Iran
Michael Greenstone, a co-founder of the group and the study's co-author, said the heat danger will likely persist beyond February — even though this El Niño is expected to end by then.
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Niño → say → February
The fallout of the weather phenomenon could be felt well into next summer, he added.
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he → feel → summer
The research, he said, shows that heat is most dangerous in places that are already hot and relatively poor.
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that → say → places
“If you’re already in a hot place, the extra couple of degrees are going to be much more dangerous,” he said.
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he → ’re → degrees
Wealthier places, he added, generally have greater access to air conditioning, reliable water supplies and functioning health systems.
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he → add → conditioning
The study combined seasonal temperature forecasts with localised estimates of how high temperatures affect mortality across more than 24,000 regions worldwide.
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temperatures → combine → regions
Researchers estimated the additional heat-related deaths by comparing deaths expected under El Niño-driven high temperatures with deaths expected if temperatures remained similar to what they have been in the last three decades.
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they → estimate → decades
The projected fatalities are for the entire El Niño period, from June 2026 until the end of February 2027.
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fatalities → project → February
The study by Greenstone and his colleagues also warns that the Global South — a term that isn't geographical but a reference to developing countries in general — will bear the heaviest burden of the excessive heat.
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that → warn → heat
The researchers behind the report found that the Sahel region in Africa — countries along the semiarid southern fringe of the Sahara Desert — is expected to be the hardest-hit, with about 66,800 additional deaths caused by El Nino-driven heat.
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region → find → heat
Other major hot spots include South and Southeast Asia and parts of Latin America, according to the report.
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spots → include → report
The researchers project about 19,400 additional heat-related deaths across the Philippines, Vietnam, Thailand and Cambodia, as well as 19,300 in Indonesia, 15,800 in India and 13,300 in Brazil.
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researchers → project → Brazil
With such staggering numbers, there are recommended measures that governments can take, the report says.
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report → be → that
They include heat-warning systems, cooling centres, hydration stations, protections for outdoor workers, expanded hospital capacity and targeted outreach to elderly people and other vulnerable groups.
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They → include → people
The authors also call for what they describe as anticipatory financing, so governments can move resources before dangerous heat peaks.
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heat → call → resources
Abhiyant Tiwari, a heat expert at NRDC India who was not involved in the study, said the report’s projections should serve as a call to action rather than be another reason for alarm.
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projections → involve → alarm
But while it's one thing to have well-thought-out plans — as India does — implementing these plans and raising needed funds remains a challenge, he said.
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he → have → funds
"The real measure of our preparedness is not how many heat warnings we issue, but how effectively we protect people and reduce preventable deaths,” Mr. Tiwari added.
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Tiwari → issue → deaths
El Niño is a natural climate pattern, but this year’s unusually strong event is occurring on a planet already warmed by human-caused climate change, increasing the risks from extreme heat.
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event → occur → heat
The Climate Impact Lab said global land temperatures during this El Niño could be higher by about 1.2 degrees Celsius (2.1 degrees Fahrenheit), producing 44% more extremely hot days than in a typical year.
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temperatures → say → year
The report said those temperature increases may mirror conditions that climate change could make common some 20 years from now.
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years → say → conditions
That's why this El Niño could offer a preview of what's ahead as the planet continues to warm, the report said.
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report → offer → preview
It's also an opportunity for decision-makers "to see exactly where emergency actions can be taken now to save tens of thousands of lives,” the authors say.
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authors → see → lives
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