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India’s average temperature has risen by nearly 0.9 degrees Celsius over the last decade (2015-2024) compared to early 20th century levels, with notable increases in the hottest days and a rise in the frequency of warm days across many regions. This significant warming trend is linked to more frequent and intense heat waves and extreme weather events, which have direct implications for public health, including heightened risks of heat-related illnesses and changing patterns of infectious diseases like malaria and dengue. Experts emphasize the urgent need for robust climate adaptation and public health strategies to mitigate these impacts and safeguard vulnerable populations.
Key Findings on Temperature Rise in India
A comprehensive peer-reviewed study shows that from 2015 to 2024, India’s average temperature increased by about 0.9 degrees Celsius compared to 1901-1930, with the hottest day of the year warming by 1.5 to 2 degrees Celsius in regions such as western and northeast India. The number of warm days has also increased by 5 to 10 days per decade, contributing to more frequent heat waves. Regional variations reveal accelerated warming in the Hindukush Himalayas with rapid glacier melt, increased heat stress and diminished monsoon rainfall in the Indo-Gangetic plains, and rising occurrences of extreme rainfall and tropical cyclones in the western parts of the country. Coastal areas face rising sea levels and enhanced tropical cyclone activity, further threatening health and infrastructure
Health Implications and Expert Perspectives
The rising temperatures heighten the risk of heat-related diseases, which disproportionately affect vulnerable groups such as infants, elderly, and outdoor workers. Studies in north-central India indicate mortality rises by as much as 33% when temperatures reach or exceed 40°C, with notable increases in hospitalizations for cardiorespiratory and heat stroke-related conditions. Infectious diseases sensitive to climate conditions, including malaria and dengue, are spreading to new geographic areas such as higher altitudes and coastal regions due to changing temperature and precipitation patterns. Public health experts like Dr Soumya Swaminathan, former WHO chief scientist, stress strengthening health infrastructure to be climate resilient, improving early warning systems for heat emergencies, and training frontline workers for timely identification and management of heat-related illnesses.
Context and Background on Climate and Health Risks
India has already been experiencing record-breaking heat waves with increasing frequency, which exacerbate health risks and pose challenges for livelihoods and food security. Climate change acts as a multiplier of health vulnerabilities by intensifying the burden of non-communicable diseases like cardiovascular and respiratory conditions. The rise in “compound events” — simultaneous extreme weather hazards like heat waves coupled with droughts — can overwhelm response systems and affect agriculture, water supplies, and human well-being. The accelerating warming trend also threatens diverse regions differently, necessitating finely tailored adaptation strategies grounded in the latest climate science.
Public Health Implications and Limitations
This temperature rise requires urgent climate adaptation measures, including climate-smart agriculture, improved urban planning with heat-mitigating infrastructure, and enhanced health system preparedness. However, some limitations exist, such as varying regional impacts and uncertainties in predicting long-term climate extremes, which complicate policy implementation. The diversity of India’s geography and population resilience means adaptation strategies cannot be one-size-fits-all but must be responsive to local vulnerabilities and capacities. Ongoing research and surveillance are essential for refining public health recommendations, especially given evolving disease dynamics and environmental changes.
Practical Advice for Readers
For individuals, reducing exposure to extreme heat by staying hydrated, avoiding outdoor activities during peak heat, and recognizing symptoms of heat stress can reduce health risks. Communities and policymakers must prioritize ensuring access to cooling centers, clean water, and healthcare services. Additionally, supporting efforts that address climate change mitigation and adaptation can contribute to broader protective effects on population health.
Medical Disclaimer: This article is for informational purposes only and should not be considered medical advice. Always consult with qualified healthcare professionals before making any health-related decisions or changes to your treatment plan. The information presented here is based on current research and expert opinions, which may evolve as new evidence emerges.
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