India's Extreme Heat and Health: Heat Waves, Data Gaps, and Practical Heat Action in Ahmedabad

Extreme heat is shaping life in India, with reports that the 50 hottest cities on the planet were all in India at one point this year and average peak temperatures around 112 degrees Fahrenheit. In this episode, Flora Lichtman speaks with Dr. Gulres Azhar, a physician and heat health researcher, about how heat affects people on the ground, especially workers in outdoor and low resource settings. The discussion covers data gaps, real world interventions in Ahmedabad, and why heat protection must consider gender and housing conditions as well as power and water access. The conversation also explores simple, practical solutions that communities and governments can implement to reduce heat related harm while balancing energy and emissions concerns.

• Heat as a health risk is not just about temperatures but also about access to water, cooling, and shelter.
• Data limitations complicate accountability for heat related deaths and illnesses.
• Ahmedabad case study shows how municipal collaboration can mitigate heat exposure in vulnerable populations.
• Myths about who is affected overlook women in slum housing and the daily realities of heat indoors.

Overview of the topic

The podcast examines how climate related extreme heat affects people in India, a country frequently cited as highly vulnerable to heat waves. The host introduces the context by noting that India has seen extreme heat events with hundreds of deaths in a short period. The discussion centers on the health impacts of heat waves, particularly for outdoor workers in hot climates, and what changes are needed to better protect people as temperatures rise. Dr. Gulres Azhar, a physician and heat health researcher, shares his trajectory from growing up in Uttar Pradesh to studying heat related health outcomes in India, including a pivotal moment when he compared Indian heat to Europe in 2003 which had a large loss of life during a heat wave. The episode then moves to a local focus on Ahmedabad and the actions taken to reduce heat related harm.

Dr. Gulres Azhar’s background and motivation

Azhar discusses his upbringing in the northern Indian state of Uttar Pradesh, a region characterized by economic hardship and exposure to both rural and urban heat. He describes his medical training in community medicine and how a public health stint in Europe highlighted stark contrasts in heating and cooling practices. These experiences helped him recognize that heat limits human adaptation and that many people in India lack access to energy intensive cooling such as air conditioning. He emphasizes that even as temperatures rise, the energy system and emissions implications of universal cooling present a complex challenge.

Data challenges and measuring heat’s health impact

The conversation addresses the difficulty of counting heat related deaths in India. Health data systems in India are fragmented; many deaths are not registered, particularly among migrant workers. Moreover, not all heat related deaths are coded as heat deaths; dehydration and organ failure can be attributed to other causes on death certificates. Azhar notes that while these data gaps hinder accountability, there are ways to infer heat related health impacts, such as using ambulance calls and summer season patterns, or leveraging novel data collection methods like phone apps. The takeaway is that data quality matters for policy and protection efforts, and innovation can help bridge the gaps.

Ahmedabad study and real world interventions

In Ahmedabad, a western Indian city, Azhar and colleagues conducted research on heat exposure among construction workers, finding that about 10% of workers were hospitalized for dehydration and heat related illnesses. Building on these findings, the municipal corporation, health department, and other agencies collaborated to implement targeted protections. Actions included keeping parks open during the day to provide cooling, avoiding unnecessary power cuts in the hottest hours, ensuring water delivery to slum communities via tankers, training health workers to manage heat stroke and related conditions, having cold water and ice packs available, and improving ambulance readiness. The program reportedly scaled to multiple cities in India, highlighting a practical, evidence based approach to heat risk reduction that can be adapted to different local contexts.

Myth busting and gendered realities of heat

The podcast challenges a common assumption that heat affects only outdoor working men. Azhar explains that in Ahmedabad, a substantial portion of households in slums lack indoor toilets and water supplies, forcing women to limit water intake to avoid using outdoor facilities. The result is gendered dehydration and higher heat related mortality among women in those settings. Smoky, poorly ventilated homes built with traditional materials exacerbate indoor heat, showing how housing design and cultural practices intersect with climate risks. This section underscores the importance of considering gender and housing conditions when planning heat protection measures.

Resilience, hope, and actionable solutions

Despite the gravity of heat related health risks, Azhar highlights the resilience and ingenuity of communities. Not all solutions need to be expensive or glamorous; many are simple, common sense measures that can reduce heat exposure. Examples include adjusting work schedules to avoid peak heat, improving hydration, enhancing ventilation and clothing choices, and placing emphasis on urban planning and tree planting to mitigate urban heat island effects. He also notes that awareness of heat as a threat makes people four times less likely to suffer heat related illness when they recognize it as a risk. The host and guest agree that addressing heat requires an integrated, cross sector approach including emission reductions, energy policy, and urban design to protect health while balancing energy needs and emissions.

Global context and forward looking concerns

The episode closes with a cautionary note about other heat vulnerable regions, including Gulf and densely populated urban areas where temperatures regularly exceed human survival thresholds when compounded by humidity. The risk of mass casualty events in scenarios of power outages or unequal access to cooling is discussed, reinforcing the urgency of building heat action plans at city, state, and national levels. The conversation ends on a note of cautious optimism that through data driven, community focused strategies, it is possible to reduce heat related harm while governments work toward broader climate and energy goals.