The IMD warns of significantly higher-than-usual heatwave days from April to June, which call for short- and long-term measures to protect people, particularly informal sector workers, from heat stress
This file photo shows a construction worker drinking water from a container as he takes a break at a construction site during a hot summer day in New Delhi, India
Image: Priyanshu Singh / Reuters
Every year is breaking last year’s record, says Seema Mundoli over the telephone. The professor at Azim Premji University, from their School of Climate Change and Sustainability, was speaking with Forbes India from Delhi on April 21, the day the capital recorded a maximum temperature of 41.3°C, more than the highest temperature of 41°C recorded in April last year. It was also the highest temperature for the month of April since 2022, as per a Times of India report.
“I have the option of not doing fieldwork in the intense afternoon heat, but the worst affected are certainly going to be people who work outside, whether it is construction labour or gig workers, who do not have the option to take time off, because they will lose the day’s wages,” she says.
Up to 75 percent of India’s workforce, or 380 million (38 crore) people, depend on heat-exposed labour, as per a 2022 World Bank report. This largely includes blue-collar and the informal sector workforce in agriculture, construction, manufacturing and delivery services. The report further said that with heat-exposed labour contributing to nearly half of the country’s gross domestic product (GDP), “by 2030, India may account for 34 million of the projected 80 million job losses from heat stress associated productivity decline”.
In January this year, the World Meteorological Organization confirmed that 2024 was the warmest year on record, at about 1.55°C above pre-industrial levels. A month later, heatwaves arrived early in India, which the India Meterological Department (IMD) called the hottest February in 125 years. The IMD further forecast above-normal temperatures in most parts of India between April and June, including extended heatwave episodes that might last 10-11 days in Central and Eastern India.
When the outside body temperature reaches close to your body temperature of 37°C, the body fails to release the internal heat that is generated as part of the basal metabolic rate, and you start to feel heat-stressed, wrote physician and global health expert Dr Chandrakant Lahariya in The Hindu on April 21. “Heat stress can affect multiple organs, including the kidneys, the liver and the brain, and may cause sickness and even death,” he said.