@Optimus_Prime bro thanks for suggestion , 5th point agree although we don't consume them. some of the relatives used to consume more earlier it affected their health badly , have observed sadness from their near family members .
@Msingh bro thanks , curtains do help blocking and saving from external heat to an extent , yes air cooler helps in cooling of temperature.
@Abhinav bro thanks , opening of windows do help in cool air circulation in evening/ early morning - ( in evening - slight mosquito issue , nets in windows is useful.) yea agree about humidity issue without proper ventilation if used desert/air cooler for longer time. cold water bottle/ice cube do help in cooling if kept near neck side or face. only slight downside due to more temp difference from outside heat , we might get cold/ cough.
@mmadhankumar bro, thank you so much , I would definitely implement 2nd option when feasible after planning budget etc . have heard it does help in cooling reflects heat. Thermocol /Gypsum and additional roof head truly great idea bro.
keeping lemon juice with us is good idea, considering the packed juice bottle available in market even the ones saying no preservatives end up having more non natural additives and added sugar . agree bout aerated drinks they do feel like refreshing when drink chilled drinks afterwards it doesn't feel that cooler in body .
I guess neutral way we could try is to keep chilled drinks in room for some time so that it comes to near normal temperature. then later could drink it.
@Optimus_Prime bro even in Southern Indian states we eat porridge rice water, few states its called kanji rice is left to absorb the water after cooked warm . with onion /pickle or other condiments & few similar side dishes mentioned by you . Irrespective of preference the side dish portion is usually kept small, as its to complement only small portion otherwise side dish end up having more spices compared to main plain rice porridge dish. its cooling & soothing.
Desert coolers are really helpful , affordable compared to ac and even efficient to an extent . its saddening due to water issues in few cities including my city, unable to use air cooler at home frequently.
Thank you so much guys for valuable suggestions.