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


Look into green roofs.
Might be a larger project to get started, than simply buying a fan, but will probably last longer and improve air quality as well as reduce heat. Even better if you can get your neighbours involved and give multiple homes green roofs together, to improve outdoors heat and air for the whole neighbourhood as well as for you individual home.