How long does it take the body to adjust to high temperatures?

If a person spent all their time in a high temperature area how long would it take for them to adjust?How long does it take the body to adjust to high temperatures?depends on where they lived before.If people of Antarctica come to Malaysia,Indonesia or Myanmar etc...those asia-country,then it'll take years for them to adapt to the hot temperature because they used to live in a very cold region.Then,suddenly go to a warm country,to them it feels like go to HELL with those burning fire.The lower the temperature of the place they lived before,the longer it take for them to adapt.How long does it take the body to adjust to high temperatures?no ideaHow long does it take the body to adjust to high temperatures?one week