Looks like this topic is couple years old.... don't know if anyone will see my answer. I went from Canada in the middle of an icy, snowy winter, to hot tropical Thailand in less than 24 hours. Back in 2013.
Before leaving, I had studied "Acclimatization".... about the body adjusting to new climates. When I got to hot tropical Thailand, I bought light, thin, roomy clothing that "breathes" and wicks moisture away so to speak... ditched the shoes and socks and got a good pair of walking sandals with arch support and heel strap, so my feet would be exposed to the air and be cooler and dryer than they would be if cooped up in socks and shoes. Always had a bottle of drinking water with me. I bought electrolyte replacement powder, but did not use a lot of it.... mixing just a bit into the water.
Wore a hat in the sun...
IMPORTANT: I did NOT use airconditioning....I only used fans in my residence room. Because I found out if you spend hours in air-conditioning.... you confuse your body's systems and you will perhaps NEVER acclimatize and NEVER get used to the tropical heat and humidity.
For the first approximately three weeks... I was suffering in the heat, very uncomfortable, sweating profusely, constantly drinking water with a bit of electrolyte powder in it... (I didn't use as much electrolyte powder as it calls for, I don't like taking in a lot of salt which is in it.)
But after about three weeks.... my sweating slowed down.. .and I started to feel a lot better. I still felt the heat but now I didn't suffer in it. I spent four months in Thailand.... and now... I swear off of air-conditioning for hot seasons or hot climates..
During the hottest part of the Thailand year, around the time of Songkran I felt okay in the heat, and sweated only a little. We had several days of 104 degrees F. (40 C.) Maybe it even went higher, I don't know. Temperatures in the mid 90's F, around 35 C, were normal.
It was funny seeing the tourists coming out from their pricy air-condtitioned hotels, and sweating and suffering in the heat, not dressed properly, over-eating, suffering and soaked in sweat, and I was fine, not soaked in sweat and used to the heat and humidity. Dress properly for the climate or hot summers at home, drink lots of water, eat smaller portion meals, lots of fresh fruits and vegatables, not so much meat.
I also lost about 25 lbs in weight in the four months I was there, walking a lot and eating like Thai people.... and I'm sure the weight loss also helped me. I ended up feeling a lot younger.... I was 61 at the time..
It took me about three weeks to adjust. Maybe a couple of days longer... and that's it.
Study "Acclimatization" before you go.. and ditch your hot sweaty shoes and socks, let your feet breath and dry in the air, and get some sun, proper sandals, not cheap flip flops.
I warn you.. if you always use cool air-conditioning, your chances of acclimatizing will be slim.. to none. And you will always suffer in the heat. Nice while your in the air-conditioning.. then feel like you're in a blast furnace when you go outside. That's not for me.