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A new Climate Impact Lab analysis projects about 15,800 additional heat-related deaths in India between September 2026 and February 2027 if the current powerful El Niño drives temperatures above those of an average year. The India heat deaths estimate is a modelled projection, not a count of deaths that have already occurred.
The report, released by the University of Chicago-affiliated research group, places the uncertainty range at roughly 15,800 plus or minus 1,600. The Indian Express, Hindustan Times and other Indian outlets reported the estimate on September 23.
What the India heat deaths estimate measures
The researchers compare projected temperature-related mortality during the six-month period with mortality expected during the corresponding months of an average year. Their baseline defines “normal” using the 1996–2025 period.
This distinction matters. The figure does not claim that every projected death will be directly recorded on a death certificate as heatstroke. Heat can worsen cardiovascular, respiratory and other conditions, and mortality models estimate the broader change associated with unusually hot days.
The report says about 451,000 additional heat-related deaths could occur globally during the same six months. India’s estimated 15,800 places it among the countries with the largest projected totals, alongside heavily affected countries in the Sahel, Southeast Asia and Brazil.
The analysis covers projections through February 2027 because that is the end of the available six-month seasonal forecast used by the researchers. They caution that anomalously warm conditions may continue beyond that date, so the six-month estimate is not presented as the full possible impact of the El Niño event.
Why cooler months can still carry risk
A notable feature of the India projection is its timing. Reports on the study say a substantial share of the estimated mortality could occur between December and February. That does not mean winter temperatures will resemble peak summer heat everywhere. It means temperatures may be unusually high relative to what people in particular places normally experience at that time.
Risk is not distributed evenly. Older adults, outdoor workers, people with chronic illnesses and households without reliable cooling or healthcare access can face greater exposure. Local humidity, night-time temperatures, housing quality and the ability to change work schedules also affect health outcomes.
Projection is a warning, not a certainty
Mortality estimates depend on weather forecasts, population data and statistical relationships between temperature and deaths. Actual outcomes can differ if the El Niño evolves differently or if communities adopt protective measures. The uncertainty range is one indication that the result should not be treated as an exact toll.
The practical value of such a projection is the lead time it offers. Heat-health action plans, early warnings, cooling spaces, adjusted work hours, reliable drinking water and preparedness at hospitals and primary-care centres can reduce exposure and improve treatment.
Readers should also distinguish between this forward-looking estimate and official mortality statistics, which are compiled after events and may use different definitions. The report identifies a public-health risk requiring preparation; it does not establish that 15,800 deaths are inevitable.
