New Delhi: As the India Meteorological Department (IMD) issues widespread heatwave alerts across several states, economists and health experts are warning that the consequences of extreme heat will extend far beyond discomfort and health risks — potentially slowing economic growth, reducing worker productivity, and increasing household medical expenses.
Heatwave alerts have been issued across Haryana, Chandigarh, Delhi, Punjab, Rajasthan, Bihar, Vidarbha, Chhattisgarh, and Jharkhand, regions where rising temperatures are expected to intensify heat stress in the coming weeks.
Heatwaves Now an Economic Threat, Not Just a Health Issue
According to Dr Sujit Paul, heatwaves have evolved from seasonal health concerns into a major economic challenge for India.
“Heatwaves in India are no longer just a health problem; they’re a major economic crisis,” Dr Paul said.
He pointed to studies indicating that extreme heat has already resulted in approximately $159 billion in lost productivity, accounting for nearly 5.4% of India’s national income. The losses stem largely from reduced work efficiency, with over 160 billion work hours lost annually due to workers being unable to perform at peak capacity in extreme heat.
Looking ahead, projections suggest that heatwaves could reduce India’s GDP by 2.5% to 4.5% by the end of this decade, with some long-term estimates warning losses could rise to 8.7% of GDP by mid-century if preventive policies are not implemented.
Outdoor Workers and Informal Sectors Face the Biggest Losses
Heat-sensitive sectors such as agriculture, construction, and informal urban labour are expected to suffer the most severe consequences.
Dr Rashmi Ardey highlighted that heat stress has become a growing socio-economic burden, particularly for daily wage earners.
“Heat stress is imposing a substantial socio-economic burden through reduced labour productivity and income losses,” she said.
According to her estimates, a 1-degree Celsius rise in temperature can reduce daily wages by around 16%, while severe heat conditions can slash earnings by 40% or more. This has direct implications for millions of families dependent on daily wages for survival.
Global estimates further indicate that heat stress could reduce total working hours by 2–3% by 2030, posing a serious challenge for labour-intensive economies like India.
Between 2021 and 2022, India reportedly lost 160–191 billion labour hours, translating into 5.4% to 6.3% of GDP. Informal workers were found to be up to 17 times more vulnerable to productivity losses due to heat exposure.
Medical Costs Rising as Heat-Related Illnesses Increase
Beyond lost productivity, heatwaves are also driving up healthcare expenses.
Heat-related illnesses — including dehydration, heat exhaustion, and severe heatstroke — have significantly increased medical spending during peak summer months.
Dr Nitin Jagasia said the cost of treating severe heatstroke alone can place enormous financial pressure on families.
Treatment for a serious heatstroke case can cost between Rs 1 lakh and Rs 2 lakh per patient, enough to wipe out savings for many working-class households.
Adding to the burden, Dr Mohit Mathur noted that many families resort to borrowing money or selling assets to manage treatment costs.
He explained that 40% of urban households and 60% of rural households depend on loans or asset sales to pay heatstroke-related medical bills. These costs are often compounded by weeks of lost wages during recovery.
Recent estimates suggest that 247 billion labour hours were lost in 2024, resulting in economic damage worth roughly $194 billion, further highlighting the financial impact of extreme heat.
Agriculture and Food Security Also at Risk
The effects of rising temperatures extend to farming and food supply systems.
A joint report by the Food and Agriculture Organization (FAO) and the World Meteorological Organization (WMO) recently warned that extreme heat is becoming a “risk multiplier” for agriculture.
The report cautioned that heatwaves could disrupt rice production in major river basins, threatening food security and rural incomes.
Reduced agricultural productivity may also lead to rising food prices, which could weaken consumer spending and slow economic activity across rural markets.
Experts Call for Stronger Policy Measures
Experts emphasise that managing the economic fallout of heatwaves requires coordinated public policy rather than short-term responses.
Measures such as heat action plans, improved cooling infrastructure, labour protections, and expanded health insurance coverage are being recommended.
Dr Paul stressed that over 90% of heatstroke cases could be prevented through early planning, improved infrastructure, and stronger public health preparedness.
“Without robust systems, rising heatwaves will continue to erode both India’s GDP and household resilience,” he warned.
Meanwhile, Dr Prasanna Karthik S advised individuals to adopt preventive habits such as staying hydrated, avoiding outdoor work during peak heat hours, and recognising early symptoms of heat-related illnesses.
He noted that simple preventive actions can significantly reduce both health risks and financial strain during extreme summer conditions.