According to the India Meteorological Department (IMD), Delhi reached 40.5°C on March 26, 2025, the warmest day of the year and 6°C higher than the seasonal average. The IMD attributed this high heat to climate change, stating that a little respite from shifting wind patterns will soon disappear, ushering in even hotter circumstances. Temperatures are expected to reach 45°C by mid-April, with the heat index potentially reaching 50°C when humidity is included. This scary estimate projects that Delhi will become the world’s hottest and most polluted metropolis by 2025, a catastrophic situation that necessitates decisive measures rather than just complaints. The growing heat waves endanger public health, with the dangers of heatstroke, dehydration, and strain energy resources as cooling demands increase. Immediate action, such as making your home more heat resistant, is required to alleviate this emerging problem and safeguard Delhi inhabitants from an increasingly hostile climate.

Fortify Your Roof: A Game-Changer for Heat Defense

The roof is frequently the largest source of heat infiltration for individuals living on the top floor, transforming homes into ovens. Fortunately, it’s also where you can have the most significant influence. Two viable options stand out: reflective roof paints and reflecting roof tiles. Reflective paints are a more economical option. A mid-range reflective paint job on a 1,500 sq. ft. roof costs approximately ₹24,000 for materials and ₹15,000 for labour, totalling less than ₹40,000. This can reduce roof surface temperatures by 15-20°C, lowering inside heat and minimising air conditioning expenses by 10-15%. Additionally, it reduces the heat your roof emits into the atmosphere, which is a little but significant step towards communal relief.

Reflective roof tiles offer a lasting and visually appealing option but are more expensive (about ₹1.5 to ₹2 lakh per area). These tiles can reduce heat absorption by up to 30%, potentially lowering indoor temperatures by 2-5 °C and saving 15-20% on cooling costs. When selecting tiles, look for those with a high Solar Reflectance Index (SRI)—the higher, the better. Choose white or light-coloured tiles, which reflect more sunshine. Both solutions make your home more comfortable and minimise your dependency on energy-intensive cooling, which in India is frequently provided by coal-powered networks which contribute significantly to greenhouse gas emissions.

Also Read: IMD Forecasts Intensified Heat Waves And Elevated Temperatures Across India From April To June

Shield Your Windows: Keeping the Heat at Bay

Huge windows are ways to make your home more heat-resistant and can transform your home into a greenhouse by allowing in constant sunlight. In my flat, an east-facing bay window was a massive heat source until I put bamboo chicks on the outside. These traditional blinds, priced at ₹10,000 for two 3×6 ft pieces, block sunlight before it hits the glass, cooling the room and providing a rustic beauty. Roll them up to view the neighbouring park and down during peak sunlight hours—a simple, practical solution.

More modern technologies like multi-layer glazing are worth considering for residences with large glass facades. Double or triple-pane windows, with gas-filled gaps between layers, offer excellent heat and noise protection. However, they’re pricier: double-pane glass costs ₹200-400 per sq. ft. (including installation), while triple-pane costs ₹800-1,200. Switching to these frequently necessitates modest civil work, which many builders avoid despite the increasing demand for substantial glass doors in new apartments. Sun control films provide a viable option if they are out of reach. These adhesive films, priced between ₹60 and 100 per sq. ft., reduce heat gain, glare, and UV radiation. They are available in a variety of tints to complement your aesthetic. Both solutions help to keep inside temperatures moderate, decreasing the need for constant air conditioning and lowering your energy footprint.

Also Read: Record Number Of UK Homes Adopt Subsidised Heat Pumps

Smart Cooling: Maximise Efficiency, Minimise Cost

When upgrading your air conditioner, look for a 5-star-rated unit that meets the Bureau of Energy Efficiency (BEE) standards. A 1.5-ton 3-star air conditioner costs ₹38,000, whereas a 5-star one costs roughly ₹48,000 and saves 25% on energy for the same cooling capacity. Investing ₹10,000 upfront can result in cheaper electricity expenses within a year, as demonstrated during last year’s lengthy summer. Beyond the item itself, how you use it is essential. The BEE recommends that you set your AC to 24°C. While this may feel too warm for some, each degree below that raises energy consumption by 5-10 per cent. Pairing your air conditioner with a ceiling fan, prevalent in most Indian houses, helps circulate cool air, making 24°C feel more pleasant and making your home more heat resistant.

Essential AC maintenance also includes closing doors and windows, using curtains to block sunlight, and cleaning air filters every other month for optimal airflow. These practices, while simple, are sometimes ignored. Some households avoid ceiling fans for aesthetics, but sustainability is the actual style statement. Every simple change—a reflecting roof, shaded windows, or effective air conditioning use—lowers cooling expenses, reduces dependency on coal-fired power, and minimises your carbon footprint. As Delhi prepares for a severe summer, these efforts are about more than just comfort; they are about accepting responsibility in a warming world.

Also Read: How Cool Roofs Could Help Tackle India’s Escalating Extreme Heat Crisis