India, May 29 -- Every April, May and June, India's capital transforms into one of the hottest urban centres on the planet. Temperatures routinely breach 45degC, and in recent years, the mercury has nudged dangerously close to 50degC. This isn't just bad luck. It's geography, climate, and human choices colliding in one megacity.

The Geography Factor

Delhi sits in the Indo-Gangetic Plain, a vast, flat expanse with no significant elevation to break incoming hot winds. Unlike coastal cities such as Mumbai or Chennai, which receive moderating sea breezes, Delhi is completely landlocked - hundreds of kilometres from any major water body. This means there is nothing to cool the air before it arrives.

To make matters worse, the Thar Desert li...