Summer is just around the corner, and Chennai homes will soon start feeling like an oven. Roofs trap heat, rooms stay unbearably hot even after sunset, and electricity bills keep rising. For many low-income and vulnerable communities, escaping the heat may be impossible.
It was in this context that IAS officer Supriya Sahu began searching for a solution that could help residents cope with rising temperatures.
Chennai’s intense summer heat last year was making daily life difficult for many households. As temperatures climbed, homes retained heat long after the sun had set. Inside cramped houses, the air remained stifling through the evening and night. Cooling appliances were not always an option for vulnerable communities, and rising electricity bills added to the burden.
Supriya Sahu’s answer lay right above people’s heads — the rooftops.
Under Tamil Nadu’s Urban Heat Mitigation Project, her team launched the Cool Roof initiative. The idea was simple, affordable and scalable. Rooftops were coated with solar-reflective white paint that reflects sunlight instead of trapping heat.
While the solution appeared straightforward, implementing it on the ground required persistence.
Getting thousands of rooftops painted was not easy. Residents hesitated. Many wondered why they should repaint a roof that had always looked the same. Convincing communities to adopt a new idea took time and effort.
Despite the hesitation, Supriya Sahu persevered. Local workers were trained to apply the coating, creating both awareness and livelihoods. Gradually, homes across heat-vulnerable areas were painted, and entire neighbourhoods began joining the initiative.
As more rooftops were coated, the results soon became visible.
Inside many houses, temperatures dropped by 5–8°C during peak summer. Rooms that once felt suffocating finally felt livable again. For elderly residents in particular, the change made a meaningful difference, allowing them to rest during the afternoon heat instead of enduring oppressive indoor temperatures.
The initiative showed how a simple intervention could help communities adapt to extreme heat without relying on expensive technology.
For helping vulnerable communities adapt to rising temperatures, Supriya Sahu was honoured with the 2025 Champions of the Earth Award by the United Nations Environment Programme.
Her work offers an important reminder: sometimes climate solutions are not complex or costly. In some cases, they can be as simple as a coat of paint on a rooftop — a small change that makes homes cooler and life more comfortable for those who need it most.
Sources:
‘IAS Officer Behind Project To Tackle Extreme Heat Wins UN Environment Award’: by J Sam Daniel Stalin, Published in NDTV on 11 December 2025.
‘Tamil Nadu IAS Officer Supriya Sahu Is Among UNEP’s 2025 Champions of the Earth’: by Down To Earth Web Desk, Published on 12 December 2025.
‘Indian Public Servant Helping Disadvantaged Communities Adapt to Rising Heat’: by UN Environment Programme, Published in UNEP in 2025.
Disclaimer : This story is auto aggregated by a computer programme and has not been created or edited by DOWNTHENEWS. Publisher: thebetterindia.com
