Just be careful of going in and out of air conditioning too often or too fast, or you may get nauseous. If you can, "acclimate" yourself by lowering the a/c in your home so your body is more used to warmer temperatures, and don't just walk into and out of a/c regularly. Maybe go sit in the shade somewhere and have a cool water then keep going, or hang out in an air conditioned spot for a few minutes then head back out for a while. I learned the nauseous part from experience!Drink lots of fluids. It also helps to walk into any air conditioned store you pass. I would also suggest that you walk plenty before your trip so that you are used to it. Last, when you here move slow. Watch people who have lived their whole lives in hot climates. They don’t move fast unless they have too.