I am from Thrissur, Kerala. It is very hot summer here. Fortunately there is plenty of water in our well. As the relative humidity is very high in Kerala, Air-coolers not giving cool. Only AC is effective. In my school days (1978 - 1990) I was living at Kothamangalam, Ernakulam District of Kerala. In that time, climate was very cool there, in the morning coconut oil in bottle was white coloured solid like paraffin wax (candle wax). Now there is also temperature is very high.