Summer is in full power here in Kerala, India. Concrete radiating heat and rooms are hot even at night.
Have seen people mention things like blackout curtains, reflective or white paint on the roof etc.
Have upped hydration and am now sleeping with windows open, with a mat on the floor.
What all things do the people in your locality do? Or if you have any specific insight into cost-effective techniques or so, could you kindly share them?
Thanks in advance


I grew up without AC. Midwest U.S. Very hot. Very humid.
Sleep naked. Sleep on cotton sheets. Not synthetic.
Open all the windows at night. Close them up by 8 or 9 am.
And fans.
Don’t underestimate what a fan can do.
You can mimic the cooling effects of sweating by misting yourself with water or jumping in the shower for 5 min and then putting a fan on.
Wet hair always helped me cool down. especially with a fan on.
We used fans a lot growing up and I use them at home now with AC. I can be comfortable at 76-78 with a fan on.
No fan, and I need 71-72.
So it’s a way to save on electricity.
Also I wear less clothes. That always helps. Avoid socks. Tight underwear.
If you are a woman, I suggest switching to boxers when you are home.
Men’s boxers are better than “women’s” boxers. Which are just expensive boyshort underwear.
You need a loose crotch area.
Just buy mens in packs. Less expensive too.
Drinking super cold water often also helps.
What I do. I have 2 water bottles. I fill them half full and put them in the freezer. I take one out at a time. Fill with water. Have ice cold water for a long time since it’s not cubed. Then when it’s no longer icey cold. Switch it out for the other.
I would do this at work. Just write your name on the bottle and tell others not to throw them out, that you reuse the same one. Otherwise someone cleaning might think the same bottle has been in there for a month and decide to toss it out.