It is currently summer in India.

Are there any behavioural or infra modifications that would help handle the increased heat?
I have read about how white roofs would reduce heat absorption and energy needed for cooling
Are there other things like that? Especially ones that regular people can try? The other type(policy decision type) are ok too tho. Would be good to know them.

Also, are there any communities that would have discussions on such topics? Like a TIL or DIY community where people talked about general issues and solutions.
Is it this community?