Heatwave is not a fun sounding word. Living through one is not fun either. At this time of the year, this is a sentiment almost every person living in Delhi and several other parts of India would agree with. For the last few weeks, temperatures across the country have been hovering way above the 40 degrees Celsius mark - safely passing the threshold of a heatwave set by the Meteorological Department. Inevitably, such extreme weather tends to make one question the status quo: Is it getting hotter every year? Is this year’s summer longer and more intense than last year’s? Research suggests, it actually is. If we look at the graph below, over the last 7 decades temperature in Delhi has risen fairly consistently. And that is not all. When we zoom out and take a macro perspective, we realise this is not just happening in Delhi or India. It is very much a global occurrence. According to official estimates , just last year almost every part of the world we live in today was eithe