Super El Niño may cause 451,000 additional deaths worldwide: Study

A University of Chicago study released on Wednesday projects nearly 451,000 additional deaths globally over the next six months due to the prevailing "Super El Niño", including 15,800 (± 1,600) more heat-related deaths in India, nearly half of them between December and February. Global land temperatures will run 1.2°C above normal with 44% more extremely hot days. Projections include 66,800 deaths in Africa's Sahel, 31,400 in Nigeria alone.

Written by AI from Hindustan Times — India · not yet reviewed by an editor · Published 23 Sept 2026, 10:48 am IST

Source

Hindustan Times — India · read the original report ↗

#el nino#climate#heat deaths#study#weather

Desk check · some claims need care

What the desk checked (5)

451,000 additional deaths projected globally over the next six months due to Super El Niño. — Attributed to a University of Chicago study released Wednesday; figure appears in source.
India may see 15,800 (± 1,600) additional heat-related deaths, nearly half between December and February. — Figure and range appear in source, attributed to the same study.
Global land temperatures will be 1.2°C above normal, with 44% more extremely hot days than a normal year. — Figures appear in source, attributed to the study; no external verification possible.
Projection window given as September 2026 to February 2027, while elsewhere stated as 'next six months'. — Internally inconsistent in the source; dates should be checked against the original study.
6,800 people dead or missing in a recent Nepal flash flood; floods struck a 72 km stretch of the Trishuli River on August 26. — Cited within the study as a comparison; no independent source given in the text.

Written by AI from Hindustan Times — India · not yet reviewed by an editor · How we use AI · Report an error

Analysts’ view opinion

AI Strategic Affairs Analyst

A projection of roughly 451,000 additional deaths in six months is not merely a public-health statistic; it is a stress test of state capacity across the Global South, and states that fail it tend to face compounding instability. The concentration of projected mortality in the Sahel — 66,800, with 31,400 in Nigeria alone — overlaps with regions already contending with fragile governance and contested territory, which is precisely where climate stress translates fastest into security stress. For India, the study's finding that nearly half of its projected 15,800 heat-related deaths fall in December-February points to a disaster-management calendar that no longer matches the traditional summer heat-planning cycle.

Heat mortality clustered in the Sahel and Nigeria lands on states where competition over water, grazing and farmland is already a driver of conflict, making this a security forecast as much as a health one.
The study's framing — that this El Niño previews the temperatures expected two decades hence — implies defence and disaster agencies are being handed an early rehearsal of a future permanent operating environment.
For India, a winter-weighted death toll argues for shifting heat-action planning, health surge capacity and worker protection earlier in the calendar, with implications for state-level disaster machinery.
Simultaneous stress across the Sahel, Southeast Asia, Indonesia and Brazil could strain the global humanitarian and disaster-relief system, raising the value of regional assistance capacity as an instrument of influence.
The authors' emphasis that targeted emergency action could avert tens of thousands of deaths frames early warning and response as a relatively low-cost, high-return investment compared with managing later crises.

What to watch — Watch whether governments and regional bodies in the flagged regions move from advisories to funded heat-action and health-surge measures in the coming weeks, and whether donors and militaries with relief capabilities pre-position resources rather than reacting after the fact.

These are modelled projections, not recorded deaths, and the story does not establish how the estimates were validated, what uncertainty attaches to most country figures beyond India's stated margin, or any actual link between this El Niño and conflict or migration outcomes.

Deep dive

Research brief · 8 facts · 5 dates · exam-ready

The brief

Context

El Niño is a periodic warming of sea surface temperatures in the Eastern Pacific, caused by weakening trade winds, that recurs every two to seven years and can last up to 12 months, altering rainfall and temperature patterns worldwide. The World Meteorological Organisation has warned that this year's event may be stronger than anything since monitoring began — a "Super El Niño" that began in June and is expected to last through the Northern Hemisphere spring. A new University of Chicago Climate Impact Lab study translates this warming into mortality estimates, projecting nearly 451,000 additional deaths globally over the next six months compared with a normal year, with India seeing 15,800 (± 1,600) additional heat-related deaths. The study frames the episode as a "postcard from our future," resembling temperatures climate change is projected to deliver 20 years from now.

Key facts

University of Chicago study, released on Wednesday, projects nearly 451,000 additional deaths globally in the next six months due to the prevailing "Super El Niño" compared to a normal year.
India is projected to see 15,800 (± 1,600) additional heat-related deaths, with nearly half falling in just three months, December to February.
Global land temperatures are projected to be 1.2°C above normal in the coming months, with 44% more extremely hot days than in a normal year.
The study's projection period is cited as September 2026 to February 2027, with impacts falling particularly on the Global South.
Africa's Sahel region (Nigeria, Sudan, Niger, Chad) is projected to see 66,800 additional deaths, including 31,400 in Nigeria alone.
Southeast Asia (Philippines, Vietnam, Thailand, Cambodia) is projected to see 19,400 additional deaths; Indonesia 19,300; Brazil 13,300 — the most in South America.
The study says 451,000 deaths in the first half of El Niño alone is about 65 times the 6,800 believed dead or missing in the recent Nepal flash flood.
On August 26, flash floods and debris flows destroyed Gyirong Port on the China-Nepal border and struck dozens of settlements along a 72 km stretch of Nepal's Trishuli River.

Timeline

JuneThe current El Niño event begins; it is expected to last through the Northern Hemisphere spring.
August 26Flash floods and debris flows destroy Gyirong Port on the China-Nepal border and strike settlements along a 72 km stretch of Nepal's Trishuli River; 6,800 believed dead or missing.
Wednesday (release date)University of Chicago Climate Impact Lab study released, projecting 451,000 additional deaths globally over six months.
September 2026 to February 2027Period over which the study's 451,000 additional deaths are projected.
December to FebruaryNearly half of India's projected 15,800 additional heat deaths expected; toll projected to keep rising into India's summer.

Who has a stake

India — Projected 15,800 (± 1,600) additional heat-related deaths, nearly half between December and February, with the toll rising into summer.
Sahel countries (Nigeria, Sudan, Niger, Chad) — Highest regional toll projected at 66,800 additional deaths, with 31,400 in Nigeria alone.
Southeast Asia, Indonesia and Brazil — 19,400, 19,300 and 13,300 additional deaths projected respectively — Brazil the worst-hit in South America.
University of Chicago Climate Impact Lab — Authored the study; co-founder Michael Greenstone and research head Tamma Carleton argue it lets decision-makers target emergency action.
World Meteorological Organisation — Has warned this year's El Niño may be stronger than anything since monitoring began and "literally off the charts".
Vulnerable populations and outdoor workers — Targets of suggested measures — heat warnings, health outreach, cooling centres, hydration stations, worker protection.
Health systems and disaster managers in the Global South — Need expanded capacity and better-targeted response to avoid tens of thousands of projected deaths.

Why it matters

The study converts a climate phenomenon into a mortality figure — 451,000 deaths, about 65 times the toll of the recent Nepal flash flood — showing that slow, invisible heat deaths, not only spectacular disasters, are the main human cost of climate shocks. Because the anomalously warm conditions resemble what climate change is projected to deliver 20 years from now, the event is a test of adaptation preparedness, especially for India and the Global South. It also shows that targeted emergency action now — warnings, cooling centres, worker protection — could save tens of thousands of lives.

UPSC angle

Prelims pointers

El Niño: periodic warming of Eastern Pacific sea surface temperatures caused by weakening trade winds; recurs every two to seven years, can last up to 12 months.
University of Chicago's Climate Impact Lab study projects 451,000 additional global deaths; India 15,800 (± 1,600).
Global land temperatures projected 1.2°C above normal, with 44% more extremely hot days than a normal year.
Sahel region named as Nigeria, Sudan, Niger and Chad — 66,800 projected deaths, Nigeria 31,400.
WMO has warned this El Niño may be the strongest since monitoring began; event began in June, to last through Northern Hemisphere spring.
Michael Greenstone is Climate Impact Lab co-founder; Tamma Carleton is Faculty Head of Research and report co-author.

Mains framing

The projection of 451,000 additional El Niño-linked deaths in six months, including 15,800 in India, illustrates how a natural climate oscillation interacts with underlying vulnerability to produce large-scale mortality. The immediate cause is a 1.2°C rise in global land temperatures and 44% more extremely hot days; the deeper causes are weak health-system capacity, exposed outdoor workforces and limited adaptation investment, which is why the burden falls on the Global South — the Sahel (66,800), Southeast Asia (19,400), Indonesia (19,300) and Brazil (13,300). The Indian pattern, with nearly half its projected deaths in December-February and a rising toll into summer, shows heat mortality is not confined to the conventional summer season. The implication, as the study argues, is that this El Niño is a "postcard from our future," replicating temperatures climate change is expected to deliver in 20 years. The way forward suggested in the source is two-tracked: immediate, geographically targeted emergency response — heat warnings, health outreach to vulnerable groups, cooling centres, hydration stations, worker protection and expanded health system capacity — and, as Tamma Carleton stresses, mobilising resources now to design, deploy and evaluate preparation and planning tools so that societies are not in a permanent state of emergency once today's extremes become the new normal.

Key terms

El Niño: Periodic warming of Eastern Pacific sea surface temperatures caused by weakening trade winds, recurring every two to seven years and affecting rainfall and temperature.
Super El Niño: Term used for the current unusually strong El Niño event, which the WMO says may be stronger than anything since monitoring began.
Climate Impact Lab: University of Chicago research group that authored the study, co-founded by Michael Greenstone, estimating temperature impacts on outcomes including death.
Sahel: African region identified in the study as comprising Nigeria, Sudan, Niger and Chad, projected to face 66,800 additional deaths.
World Meteorological Organisation (WMO): Body that warned this year's El Niño may be "literally off the charts" compared with the monitoring record.
"Postcard from our future": The study's phrase for El Niño conditions resembling temperatures climate change is projected to deliver 20 years from now.

Practice questions

Critically examine how El Niño events magnify existing vulnerabilities in the Global South, using the projected mortality figures of the University of Chicago Climate Impact Lab study.
"Heat is a silent disaster." Discuss with reference to the comparison between the 451,000 projected El Niño deaths and the Nepal flash flood toll of 6,800.
What short-term emergency measures and long-term adaptation investments does India need to reduce heat mortality, given that nearly half its projected El Niño deaths fall between December and February?

Grounded only in the source report — figures and dates are the source's, not inferred.

Next storyAI must not create new divides, says Jaishankar →

← All stories