As temperatures across India’s capital continue to climb during another summer of extreme heat, the impact is being felt most acutely by those with little protection from the elements. For the hundreds of thousands of people living on Delhi’s streets, daily life unfolds under relentless heat, limited access to essential services and constant uncertainty about safety and survival.

Among them is Shahida, a 20-year-old mother who lives with her family beneath a flyover in Delhi. Their home consists of a section of pavement where they sleep under mosquito nets and store their belongings. Throughout the day and night, they remain exposed to conditions that climate experts say are becoming increasingly dangerous as heatwaves intensify across the region.

Delhi has been experiencing sustained high temperatures, with daytime readings regularly reaching 43 degrees Celsius. Nighttime temperatures have also remained unusually elevated, providing little relief after sunset. According to reported meteorological data, the city recently recorded its warmest May night in nearly 14 years.As authorities issue repeated heat alerts and many residents seek refuge indoors, an estimated 300,000 people living without permanent shelter continue to face direct exposure to extreme temperatures.

Their vulnerability extends beyond heat alone, encompassing challenges related to food security, drinking water, sanitation and healthcare access.Climate researchers say homelessness significantly increases the risks associated with extreme weather.

Chandni Singh, a lead author with the Intergovernmental Panel on Climate Change, noted that people without stable housing often lack reliable access to basic resources required to cope with prolonged periods of heat.“Beyond exposure alone, homelessness is often accompanied by unreliable access to food, water and healthcare all of which are essential to cope with and adapt to extreme heat,” Singh said.

The consequences can be severe. According to a report by the Centre for Holistic Development, at least 192 homeless individuals died during a nine-day period of extreme heat in Delhi last summer. The deaths highlighted the disproportionate burden borne by vulnerable populations during heatwave conditions.

For Shahida, summer brings anxiety long before temperatures reach their highest levels. Having spent most of her life living in similar circumstances, she said the arrival of hotter months is accompanied by concerns about health, safety and the wellbeing of her young daughter, Jannat.Throughout the day, the family must manage basic needs while exposed to intense heat.

Access to cold drinking water is limited. They rely in part on a nearby public institution that permits them to fill containers during evening hours, allowing them to store water for later use. The supply, however, remains constrained and dependent on availability.The challenge of securing shelter is equally significant.

According to Indu Prakash Singh, a member of a state-level shelter monitoring committee established by India’s Supreme Court, Delhi faces a substantial shortage of accommodation for homeless residents. He estimates that the city’s shelter capacity falls short of demand by approximately 75%, leaving many families with few alternatives to sleeping outdoors.

Although a women’s night shelter operates less than 200 metres from where Shahida’s family sleeps, she said conditions inside often provide little respite from the heat.“It is even hotter inside than outside,” she said.The concern is echoed by shelter advocates. Singh said many facilities consist of portable cabin-style structures that absorb and retain heat during summer months.

In some locations, cooling systems are insufficient or non-functional, reducing their effectiveness during periods of extreme weather.Conditions inside shelters can also become crowded, particularly during heatwaves when more people seek relief. Reports from facilities in Delhi indicate that access to cooling equipment is often limited, leading to competition among residents for the coolest spaces.As evening approaches and temperatures begin to decline slightly, daily routines continue beneath the flyover.

Families prepare simple meals, organize belongings and make arrangements for the night. Shahida’s family reheats rice and curry cooked earlier in the day before setting up sleeping mats on the pavement.The reduction in temperature after sunset offers only partial relief.

Even at night, the heat remains significant, and concerns about security persist. Women living on the streets frequently report remaining alert long after lying down to sleep, aware of potential risks to themselves and their children.Shahida said rest is often difficult to achieve despite physical exhaustion. The combination of environmental stress, uncertainty and responsibility for a young child creates a constant state of vigilance.

“Even when your eyes close, your mind stays awake. I need to be always protective of myself and my child,” she said.Around her, other families settle in for the night under mosquito nets and makeshift shelters. Some fan children in the humid air while others arrange possessions in an effort to create a small sense of privacy amid the traffic and noise of the city.

Experts increasingly view such experiences as evidence of the broader social consequences of climate change. Rising temperatures, more frequent heatwaves and warmer nights are expected to place additional strain on urban populations, particularly those lacking adequate housing and access to public services.For homeless residents, adaptation options remain limited.

Without permanent shelter, air conditioning or reliable access to cooling infrastructure, exposure to dangerous temperatures becomes an unavoidable feature of daily life.As traffic continues to flow above and around the flyover where she lives, Shahida said her focus remains on caring for her daughter and enduring each day as it comes.

Looking at the child sleeping beneath a mosquito net on the pavement, she described Jannat as the source of her determination to keep going despite the hardships of life on the streets.“Maybe she is the only hope I still hold on to,” Shahida said. “Otherwise, I don’t know what is left.”

India’s informal workforce is increasingly struggling to cope with intensifying heat as rising daytime temperatures and warmer nights reduce opportunities for physical recovery, according to workers, researchers and a new regional study examining the impact of extreme heat across major Asian cities.

In Delhi, where temperatures have climbed above 45 degrees Celsius during recent heatwaves, delivery rider Jalaj Jha begins his workday already fatigued. The 24-year-old gig worker, who delivers groceries on a motorbike, said sleep has become increasingly difficult in the summer months because of the heat trapped inside his small rented room.

Jha, who lives in accommodation with limited ventilation and relies on a fan that circulates warm air, said he often sleeps only three to four hours a night. By the time he starts preparing for work in the morning, he already feels physically exhausted. His daily shift lasts about 12 hours, exposing him to prolonged outdoor temperatures that continue to rise through the day.

Delhi this week recorded its hottest day in May in two years and its warmest May night in 14 years, underscoring a broader trend identified by climate researchers across South Asia. Scientists have warned that night-time temperatures in many parts of the region are increasing faster than daytime temperatures, reducing the hours traditionally available for cooling and recovery after extreme heat exposure.

A report released by the United States-based organization People’s Courage International (PCI) found that rising overnight temperatures, combined with the urban heat island effect, are creating worsening conditions for millions of informal workers across South and South-East Asia. The urban heat island effect refers to the tendency of densely built urban areas to retain heat absorbed during the day, keeping temperatures elevated after sunset.

The study examined conditions in Delhi, Dhaka, Kathmandu, Jakarta and Quezon City. Researchers concluded that many workers are beginning their workdays in a state of accumulated fatigue because they are unable to cool down adequately during the night.

The report focused on workers employed in sectors that require prolonged exposure to outdoor conditions, including delivery services, construction and street vending. Many of these workers live in densely populated settlements where access to ventilation, cooling equipment and reliable electricity remains limited.Researchers said the inability to recover physically during the night is contributing to a range of health and economic pressures. Workers interviewed for the study described increasing difficulty maintaining productivity, higher spending on coping measures and greater vulnerability to heat-related illness.

According to PCI, nearly eight in ten of the more than 2,200 internal migrant workers surveyed across the five cities reported that extreme heat was affecting their livelihoods or household conditions. Respondents said they were losing income because they could not complete full work shifts during periods of extreme heat.

Many also reported spending additional money on drinking water, transportation, medicines and other heat-related necessities.The study documented widespread reports of headaches, dizziness, fatigue and reduced work capacity during prolonged exposure to high temperatures. Researchers said these effects often develop gradually rather than through dramatic medical emergencies, making the broader impact of heat difficult to recognize despite its cumulative consequences.

“Heat impacts are silent and generally creep up on workers,” PCI researcher Ameena Kidwai said. She noted that workers described heat-related disruptions not only during working hours but also during commuting, at home and in their broader social lives. The effects, she said, extended to mental wellbeing and community interactions.

The findings come as climate scientists warn that global warming is increasing the likelihood and severity of heatwaves across South Asia. Researchers have projected that climate change could significantly increase the probability of prolonged pre-monsoon heatwaves in the region. Last month, a 15-day heatwave affected large areas of South Asia and was linked to fatalities.

The International Labour Organization estimates that more than 70 percent of workers across Asia are exposed to excessive heat during at least part of their employment. The risks are particularly significant in countries such as India, where nearly 90 percent of workers are employed in the informal economy and often lack workplace protections available in formal sectors.

Ajay Kumar, a 32-year-old vegetable vendor working in Gurugram near Delhi, said extreme heat has become a daily challenge. Kumar purchases produce from a wholesale market approximately seven kilometers from where he sells vegetables and transports the goods using a three-wheeled rickshaw through heavy traffic.

He said the heat frequently causes dizziness while he works, but economic pressures leave little room to reduce his hours. Kumar supports a family of six and migrated from Bihar four years ago in search of employment opportunities.Living conditions further compound the challenge. Kumar, his wife and four children occupy a single room with minimal ventilation and only a basic fan for cooling.

He said he had hoped to purchase an air cooler before summer but could not afford the expense.According to Kumar, his daily earnings generally range between 300 and 400 rupees, with most of the income devoted to household necessities. To manage the heat, he carries water and keeps a damp scarf around his head while working.Even after returning home, relief is limited.

During particularly hot nights, Kumar and his family sleep on the open terrace of their building because indoor temperatures remain too high for comfort. Despite moving outdoors, he said it can still take several hours before he is able to fall asleep.Governments across the region have introduced measures aimed at reducing heat-related risks. Delhi authorities have implemented heat action plans that include public advisories, early warning systems, water distribution points and recommendations encouraging the rescheduling of outdoor work during the hottest parts of the day.

Researchers, however, said many existing responses remain focused on immediate heat emergencies rather than the broader issue of recovery and living conditions. They argued that policies addressing housing quality, ventilation, access to cooling and worker protections will become increasingly important as temperatures continue to rise.

The PCI report found that for many workers, the most significant impact of extreme heat is not limited to the hours spent outdoors. Instead, it is the growing inability to recover between shifts, creating what researchers described as a “recovery deficit” that leaves workers physically depleted before each new workday begins.

The ministry said India successfully met a peak power demand of 270.82 gigawatts (GW) on Thursday, marking the fourth straight day of all-time high electricity consumption as soaring temperatures across large parts of the country drove increased use of cooling appliances.

“Although we are prepared to supply electricity as required, due to the intense summer, let us all try to use electricity wisely and judiciously,” the ministry said in a statement, while noting that rising demand appeared to be linked to greater usage of air conditioners, coolers and other cooling equipment.

The warning comes as large parts of northern and central India continue to endure severe heat conditions. According to the India Meteorological Department (IMD), the highest temperature recorded on Thursday was 47.6 degrees Celsius in Banda district of Uttar Pradesh, while New Delhi registered temperatures of around 43 degrees Celsius on Friday.

The heatwave has also pushed nighttime temperatures to unusually elevated levels, limiting relief for residents and increasing electricity consumption around the clock. One of New Delhi’s principal weather stations recorded a minimum temperature of 31.9 degrees Celsius on Thursday, the highest May overnight temperature in the capital in 14 years, IMD data showed.

India’s electricity generation mix remained dominated by thermal power, primarily coal-fired plants, which accounted for 62% of output on Thursday. Solar energy contributed 22%, while wind and hydropower each represented about 5% of generation, according to official data.

Despite the ministry’s assertion that demand was being met, some users reported localized outages on social media platform X. Industry analysts note that extreme heat can strain aging distribution infrastructure, including transformers and local transmission networks, leading to isolated power disruptions even when overall generation capacity remains adequate.

The prolonged heat has also affected water bodies and ecosystems. In New Delhi, municipal workers were seen removing dead fish from Sanjay Park lake after shrinking water levels and high temperatures reduced oxygen concentrations in the water.

India, the world’s most populous nation and the third-largest emitter of greenhouse gases, has pledged to achieve net-zero emissions by 2070 but continues to rely heavily on coal to meet growing energy demand.
Meteorologists have warned that minimum temperatures across the country are likely to remain above normal through May.

The IMD said average minimum temperatures in April were 0.78 degrees Celsius higher than the long-term average nationwide.

Scientific studies have linked the increasing frequency, duration and intensity of heatwaves globally to climate change, with India experiencing a series of increasingly severe summer heat events in recent years.

The country’s highest officially recorded temperature remains 51 degrees Celsius, measured in Phalodi, Rajasthan, in 2016.