Science 15 Jun 2026

Delhi's temperature showed 43.5C. Why did it feel hotter?

We spent a day out in the city with a thermal camera, recording surface temperatures indoors and outdoors.

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For several weeks now, the Indian capital, Delhi, has been battling a. Severe heatwave, with temperatures routinely rising above 40C. On Tuesday, the Indian Meteorological Department (IMD) recorded the maximum day temperature. At 43.5C in the capital. But we spent the day out on the city streets with a. Thermal camera deployed by Greenpeace India. recorded surface temperatures of up to 64C in some places. The IMD's official data reflects the temperature of the city air measured. Under standard conditions. thermal cameras record the temperature of surfaces. On hot days, roads, concrete, vehicles and other exposed surfaces can become.

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