I think this will become true, and not just in India: Are parts of India becoming too hot for humans? – CNN.
Already we have parts of the world barely inhabitable due to extreme weather. Think of Antartica on one hand, and the Sahara desert on the other. Soon places in India will join them. Other parts will become inhabitable for different reasons: extreme weather and flooding.
If you want to understand the challenge of dealing with climate change, then read this: Climate change and the 75% problem | Bill Gates.
There are things you can do in your own day to day to reduce your contribution to climate change. But in the bigger picture, much larger changes have to happen. And soon. You can contribute there too, by supporting politicians and companies and other organizations that are working to make big positive changes.
You can’t do it alone, but every thing you do move us in the right direction. We are cutting out coal. We are getting energy efficient. We are eating more of the right things. Many many things are being done that help, and much more can be done to improve things. Keep up the good work, and work hard to avoid complacency and despair.