In india and 41 degree hot climate what to do at noon to be chill?

If you don't have air conditioning available to you, make appropriate use of water, wind, and/or shade.

Swim, take a shower, or just spray yourself with water.

Stay out of the sun, and if you do have to go out, at least wear a broad-brimmed hat or carry an umbrella.

Find a breeze, or use a fan (hand or mechanical) to make one.

For maximum benefit, spray yourself with water and sit under a tree with some wind.

1. Visit a hill station

2. Sit in an air conditioned room

3. Sit under trees

The same thing your nation has been doing for centuries. This is not new.