Global Warming and India’s Rising Temperatures: Heatwave Intensity, Health Hazards and Economic Impact

India is getting hotter every year. As the world’s temperature rises because of pollution, India is one of the countries that is feeling the impact the most. With more than 1.4 billion people, crowded cities, and many people depending on farming, rising heat is not just a number or report. It is something people are dealing with in real life, especially during the summer months, where it can even become dangerous for their health and daily life.

Heatwave Intensity: A Worsening Pattern

India has always had hot summers, but things have changed a lot in recent years. Now, heatwaves are stronger and last longer. The India Meteorological Department says it is a heatwave when the temperature goes above 40°C in plain areas or 30°C in hilly areas, and is about 4.5–6.4°C higher than normal.

Since the 1990s, heatwaves have been happening more often and are becoming more intense. In 2022, March was the hottest in more than 100 years. Temperatures in Delhi, Rajasthan, and Uttar Pradesh exceeded 48°C in 2024. The Indo-Gangetic Plain, where millions of people live, is now one of the most heat-affected regions in the world.

Experts also warn that if global warming goes above 2°C, India could start facing “wet-bulb” temperatures more often. Wet-bulb temperature means the combined effect of heat and humidity. Even when sitting in the shade, the human body cannot adequately cool itself at a wet-bulb temperature of about 35°C, which makes staying outside extremely risky.

Health Hazards: A Silent Emergency

Rising temperatures are seriously affecting people’s health in India. Heat-related problems can range from tiredness and muscle cramps to dangerous conditions like heatstroke. Between 2010 and 2020, over 17,000 deaths were linked to extreme heat, but the real number may be higher as many cases are not reported. The elderly, children, farmers, outdoor labourers, and others without access to cooling systems suffer more than others. Cities feel considerably hotter because of buildings, roads, and a lack of vegetation that trap heat.

In addition to posing immediate health hazards, rising temperatures worsen the quality of the air and accelerate the spread of illnesses like dengue and malaria. The availability of food and water may also be impacted. Heat can also have an adverse effect on mental health, leading to tension, worry, and annoyance. Hospitals in northern India frequently experience overcrowding during the busiest summer months, placing additional strain on a healthcare system that already finds it difficult to meet patients' demands. 

Economic Impact: Counting the Cost

The heat crisis in India has a significant negative economic impact. A study by the McKinsey Global Institute says that by 2030, extreme heat could reduce India’s GDP by around 2.5–4.5% every year, mainly because people are not able to work as much as before. Outdoor workers, especially those in construction, farming, and daily wage jobs, often have to cut down their working hours or stop work completely during very hot days.

Farming, which gives jobs to nearly 44% of India’s workforce, is also badly affected. Crops like wheat, rice, and pulses are not growing as well as before because the seasons are changing and the soil is drying out faster. Excessive heat also reduces the amount of milk that animals produce and their productivity.

Even basic facilities are getting affected. Roads can break or get damaged in the heat, railway tracks can become slightly bent, and the electricity system gets overloaded because many people use fans and air conditioners at the same time. Power outages are more frequent during heatwaves, which worsens the situation for those who most need cooling. Sectors like tourism, factories, and transport are also facing problems as extreme heat keeps increasing.

The Road Ahead

India has already started taking some steps through its National Action Plan on Climate Change and city-level Heat Action Plans. One good example is Ahmedabad, which was among the first cities in Asia to set up an early warning system after a very deadly heatwave in 2010. But these steps need to be increased and carried out on a much higher level. 

More trees should be planted, cleaner energy should be used, and homes should be built to stay cool during extreme heat. Public places should also be created where people can rest and cool down during heatwaves. These steps are becoming very important now.

At the global level, India also keeps asking for climate justice. This is because India has contributed much less to past emissions compared to richer countries, but it is facing much stronger impacts of rising heat. The message is clear: the heat is no longer something in the future. It is already happening now.