brother if people there are usually poor, why you want them to change their habits, 47-50 C is not just came this summer, its the history of that area/region and people are used to it, AC is a luxury u agree or not..
Room coolers or Mist fans are better and affordable option.
. In karachi, a number of Mosques have ACs installed, but mostly they are closed due to huge bill that cant be paid from Masjid fund.
Once people get used to AC, they will become 5 times namazi 
for getting a cool environment, You said people are poor then they must belong to the labor class, once the labor class people get addicted with AC, they cant work that much hard as they do.
