As the heatwave becomes longer, harsher, and increasingly dangerous, The Innovators Jam brings you a roundup of affordable, high-impact innovations designed to help people stay cool and survive extreme temperatures.
It is mid-May, and cities across India are already breaching 44°C. In Delhi, the asphalt shimmers. In Rajasthan, heat crushes tin-roofed homes, pressing down on the people inside. Extreme heat has quietly become the deadliest climate hazard on the planet, killing more people each year than floods, storms, and cyclones combined.
Scientists at Oxford University have warned that even under the most optimistic climate scenarios — where global warming is held to 1.5°C — the number of people living in extremely hot regions will more than double, from around 1.5 billion today to nearly 3.8 billion by 2050. The numbers are staggering, yet, tucked inside this crisis is something remarkable: a surge of human ingenuity aimed squarely at keeping people alive.
Only about 30% of Indian households can currently afford air conditioning or coolers — which means most of the country is on its own: Data for India
The scale of the cooling gap is vast. Mechanical air conditioning, the obvious solution, is simply out of reach for most of the world’s most heat-exposed populations. That gap is forcing inventors, engineers, city planners, and scientists to look elsewhere — and what they are finding is genuinely surprising.
Five innovations changing the heat equation
From community shelters in Jodhpur to reflective rooftops in Mumbai, here are the ideas gaining real traction:
Researchers have developed Mod-Roofs made from recycled materials that cut indoor temperatures by 6 to 8°C. Paired with Air Lite Ventilators that boost natural airflow, these upgrades cost a fraction of conventional AC.
2. Net-zero cooling shelters, Jodhpur
Solar-powered community cooling stations built using wind towers, vetiver curtains, and misting fans — no air conditioner required.
Each shelter holds around 40 people, offers ORS and first aid, and runs entirely on renewable energy. The model, launched by NRDC and Mahila Housing Trust, is now being replicated across heat-vulnerable urban zones in India.
3. Cool roofs and reflective surfaces
Light-coloured roofing materials with high reflectivity can reduce roof surface temperatures by up to 25°C. Cities from Paris to Mumbai are scaling this alongside reflective road pavements and rooftop gardens to fight the urban heat island effect.
4. Wearable heat-stress sensors
More than 2.4 billion workers globally are exposed to excessive heat, causing over 22 million occupational injuries annually, according to the WHO.
Wearable sensors that track temperature and heart rate in real time are now being trialled in industrial and construction settings, issuing alerts before a worker reaches a dangerous threshold.
5. AI-enhanced heat alert systems
Next-generation early warning systems use AI to identify the most heat-vulnerable population such as the older people, infants, outdoor workers and push targeted advisories before a heatwave peaks.
The Way Forward for India
India’s Heat Action Plans are being modernised with these tools to shift from reactive rescue to proactive prevention, with Kerala already piloting UV and heat alert systems at district level.
What unites all these approaches is a shift in thinking: cooling is no longer just a comfort issue. It is a public health emergency, an economic risk, and a matter of survival for billions.
The race to cool the planet is also driving a parallel race to cool our cities, our homes, and our bodies. And if the pace of innovation in the last two years is any indication, the solutions are coming faster than the heatwaves.
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