Indian cities embrace white rooftops to beat rising temperatures without fans or ACs
An increasing number of Indians are adopting white rooftops as an affordable and effective way to beat rising temperatures. With summers becoming longer and hotter, especially in densely built urban areas, staying cool is becoming both more challenging and costly. For many low-income families, air conditioners are not a viable option. That’s why a simple yet effective solution is gaining popularity across India—painting rooftops white. Known as cool roofing, this technique helps lower indoor temperatures by a few degrees without consuming electricity. It’s affordable, low-tech, and proving to be a game-changer. Heat death in India in 2024 In 2024, the Union Ministry of Health and Family Welfare reported 360 heatstroke deaths, but a separate report recorded a much higher toll of 733 deaths and over 40,000 heatstroke cases across 17 states. Between March and June, India endured record-breaking temperatures, with 37 cities exceeding 45°C. A news analysis on heatstroke deaths by the non-profit HeatWatch revealed major discrepancies between official government figures and those reported by the media. The National Programme on Climate Change & Human Health (NPCCHH) and the National Centre for Disease Control (NCDC) issued three key guidelines to reduce heat-related deaths, including the 2021 National Action Plan on Heat-related Illnesses and the 2024 guidelines on emergency cooling and autopsy findings. However, the report found that many healthcare professionals were unaware of these protocols, and hospital infrastructure remained insufficient to handle the increasing cases of heatstroke. How the white rooftops make life comfortable Imagine wearing black on a sunny day—it absorbs heat and makes you feel even hotter. The same happens with rooftops. Experts say regular concrete or metal roofs can reach scorching temperatures of 65°C or more. However, a simple coat of white or reflective paint can keep a roof up to 28°C cooler, significantly reducing indoor heat. By reflecting sunlight instead of absorbing it, the method keeps rooms cooler underneath, even without fans or air conditioners running all day. Programme Manager of the Sustainable Habitat Programme at the India-based Centre for Science and Environment, Sugeet Grover, emphasized that even a 2-5°C drop in indoor temperatures can make a significant difference for families living in small or poorly ventilated homes. However, he cautioned that not all white paints offer the same level of heat reflection. "White is the color that reflects the most light, but that doesn't mean any white paint will yield the same results," he explained. "Different paints have varying reflection values—some reflect more, some less. The reflectivity of the material itself also matters. Still, a simple white paint is better than none," he clarified. In a Zoom interview with JoyNews’ Mahmud Mohammed-Nurudeen, Sugeet emphasized that once users experience more comfortable indoor temperatures, they will rely less on fans and air conditioners, significantly reducing electricity and cooling costs.
