thats the trouble with hot climates. there are only so many layers of clothing you can remove before you are naked but still as uncomfortably hot.

air con is only of any use indoors, you cant take it outside with you and fans just the blow hot air that is the cause of the discomfort right back onto you. the cooling effect is minimal once the humid and high 30s are reached.

the beauty of a cold climate is that you need never be cold, you just keep adding layers of clothing until you achieve the degree of comfort required.
first the vest, then the warm shirt, if that isnt enough then on with the sweater, followed by the jacket and if you need more just reach for the overcoat, scarf, gloves and a hat.

the body supplies its own heat from within and the clothes stop the heat from dissipating into the atmosphere.