Heat – The New Form of Inequality – Asrar Qureshi’s Blog Post #1262

Heat – The New Form of Inequality – Asrar Qureshi’s Blog Post #1262

Dear Colleagues! This is Asrar Qureshi’s Blog Post #1262 for Pharma Veterans. Pharma Veterans Blogs are published by Asrar Qureshi on its dedicated site https://pharmaveterans.com. Please email to pharmaveterans2017@gmail.com  for publishing your contributions here.

Credit: Tom Fisk

Preamble

This blog post is based on insights from an article by James Karuga. Link at the end.

When Heat Becomes Inequality: How South Asia’s Cities Are Being Redefined by Extreme Temperatures

Heat used to be considered a weather problem. Now it is becoming a poverty problem.

In South Asia, extreme heat is no longer simply an uncomfortable seasonal event. It is increasingly a force that determines who can work, who can sleep, who can remain healthy, and in some cases, who survives.

The cruel truth is this: heat does not affect everyone equally.

Recent analysis highlights how heatwaves are deepening urban inequality across South Asia, turning climate stress into an economic and social divider. This is not merely an environmental story; it is a story about inequality, public health, urban planning, and the future of human dignity.

The New Geography of Urban Hardship

South Asia is one of the world’s most climate-vulnerable regions. With dense populations, rapid urbanization, aging infrastructure, and widespread informal employment, its cities are uniquely exposed to extreme heat.

Cities such as Delhi, Karachi, Dhaka, Lahore, and Mumbai, are becoming thermal pressure cookers.

Why? Because cities trap heat. Concrete absorbs solar radiation, asphalt stores heat, buildings block airflow, while green spaces shrink. This creates the urban heat island effect, where cities become significantly hotter than surrounding rural areas.

But here is where inequality enters. The wealthy experience heat differently. They retreat indoors, they switch on air conditioners, they work remotely, and they access healthcare. The poor do not have those options, and so, climate becomes class.

Heat Poverty: A New Form of Inequality

One of the most striking insights from current discussions is the emergence of what might be called cooling poverty. This is the inability to protect oneself from dangerous heat due to economic constraints. 

Imagine two residents in the same city. One spends the afternoon in an air-conditioned office. Another sells fruit beside a traffic-clogged road at 46°C. Same city, same heatwave, yet entirely different realities.

This is not simply about comfort. Extreme heat affects kidney function, cardiovascular health, mental performance, sleep quality, productivity, and even mortality. 

For informal workers, staying home is often impossible. No work means no wages, no food, and no rent. This creates a devastating equation. Work in dangerous heat or lose income essential for survival.

The Productivity Trap

Heat is becoming an economic thief. As temperatures rise, labor productivity falls, outdoor work becomes hazardous, physical exhaustion rises, and mistakes increase.

Construction workers, street vendors, delivery riders, traffic police, factory laborers, and many other workers form the economic backbone of South Asian cities. And they are among the least protected. Unlike office-based professionals, their work cannot be shifted to Zoom. Heat therefore creates a productivity inequality.

The rich lose comfort. The poor lose income. That distinction matters enormously.

Housing Inequality Becomes Thermal Inequality

Housing determines heat exposure. In affluent neighborhoods, better insulation, air conditioning, backup electricity, tree-lined streets, and lower density planning is seen. In informal settlements, tin roofs, poor ventilation, overcrowding, limited water access, and frequent power outages, make lives miserable.

These differences are not architectural details; they are survival factors. 

A tin-roof dwelling in summer can become dangerously hotter than ambient outdoor temperatures. Night offers little relief because dense urban construction traps heat after sunset. This creates cumulative stress marked by no rest, no recovery, and no resilience. Children suffer, elderly residents suffer, pregnant women suffer, and people with chronic illness suffer most.

Urban inequality is no longer just economic; it is thermal also.

Climate Change as an Inequality Multiplier

Climate change rarely creates inequality from scratch. It amplifies what already exists. In weak healthcare systems; heat worsens outcomes. Poor housing; heat magnifies exposure. Economic insecurity; heat reduces earning capacity. Inadequate city planning; heat becomes deadly.

That is why climate change must be understood not merely as an environmental issue, but as a force multiplier for social vulnerability. And South Asia is particularly exposed.

A World Bank perspective has warned that heatwaves in the region are becoming more likely and more intense, with severe implications for vulnerable populations.

The Gender Dimension of Heat

Heat inequality also has a gender face. Women in low-income urban settings often face layered vulnerabilities. Indoor heat from poorly ventilated homes, domestic cooking in already hot environments, water collection burdens, and caregiving responsibilities during heat illness. Women working in informal sectors face dual exposure due to economic stress outdoors, and thermal stress indoors.

Children are especially vulnerable. Extreme heat can affect hydration, learning capacity, physical development, sleep quality, and long-term health.

Why Cities Are Making It Worse

Some of this crisis is climate driven; some is urban design failure.

Many South Asian cities expanded rapidly without adequate planning. The result is dense construction, minimal green cover, asphalt dominance, reduced natural ventilation, and weak zoning discipline.

Urban design choices create heat traps. This means heat mortality is not only about weather, but also about governance. A badly designed city becomes a hazard.

Air Conditioning Is Not the Complete Answer

The instinctive solution is obvious: more cooling. But this creates its own challenge.

Air conditioning is expensive, energy-intensive, and unequally accessible. Mass adoption without systemic planning can increase electricity demand, which may trigger grid failures, raise emissions, and intensify urban heat through waste heat discharge

So, while cooling access matters, air conditioning alone cannot solve urban heat inequality.

What Cities Must Do

South Asia needs climate adaptation that is socially equitable. That means moving beyond emergency responses toward structural solutions.

Heat-Sensitive Urban Design: Cities must increase tree canopy, green corridors, reflective roofing, shade infrastructure, and ventilation-aware planning. Design can cool cities significantly.

Protection for Informal Workers: This includes heat-safe work timing, hydration access, public cooling shelters, and occupational safety protocols. Workers should not have to choose between heatstroke and hunger.

Affordable Cooling Access: Policy must explore subsidized cooling technologies, efficient fans, community cooling centers, and energy support for vulnerable households. Cooling should become a public health priority.

Housing Upgrades: Thermal resilience must become part of affordable housing strategy. Simple interventions matter, such as, better roofing materials, ventilation improvements, insulation retrofits, and shaded communal spaces.

The Pakistan Perspective

For Pakistan, this issue is immediate. Cities such as Karachi, Lahore, Rawalpindi, Faisalabad, and Multan face rising heat risk. Challenges include rapid urban expansion, informal housing growth, power supply instability, water stress, and vulnerable labor populations.

Heatwaves must be treated like serious disasters. Cities need clear alerts, public guidance, school protocols, and hospital preparedness.

Heat adaptation should become central to urban policy; not peripheral. Because extreme heat is no longer an occasional event. It is becoming structural reality.

Sum Up

South Asia’s heat crisis reveals an uncomfortable truth. Climate change does not treat everyone equally, but society determines how unequal the consequences become.

Extreme heat is becoming a mirror. It reflects poor planning, economic inequality, governance failures, and social neglect. And unless cities respond differently, heat will continue rewriting the rules of urban life.

The future challenge is not simply managing hotter weather. It is ensuring that survival does not become a luxury. Because in the end, a just city is not one where some people can escape the heat; it is one where no one is left defenseless against it.

Concluded.

Disclaimers: Pictures in these blogs are taken from free resources at Pexels, Pixabay, Unsplash, and Google. Credit is given where available. If a copyright claim is lodged, we shall remove the picture with appropriate regrets.

For most blogs, I research from several sources which are open to public. Their links are mentioned under references. There is no intent to infringe upon anyone’s copyrights. If, any claim is lodged, it will be acknowledged and duly recognized immediately.

Reference:

https://www.developmentaid.org/news-stream/post/206662/heatwaves-are-rewriting-south-asian-urban-inequality?utm_campaign=NewsDigest&utm_medium=Email&utm_source=Newsletter&token=db66c8c8-346f-4eae-bfa0-543169fbb180