Chapter 1 of Ministry for the Future tells the fictional story of a massive heatwave with power failure (nice AC you got there...) across a region of India.
And as a fictional story, it's just the author's completely arbitrary rendering of something that hasn't yet happened anywhere in the world. It's tiresome to see people citing that piece of text as if it were in any way a scientific source or prediction of anything.
A bit like citing Paul Ehlrich's hypothetical predictions of massive famines in the world of his future.. Oh but wait, they all turned out to be completely false.
Said chapter is available from the publishers here: https://www.orbitbooks.net/orbit-excerpts/the-ministry-for-t...