Expats and the hot season in country

I've heard that one will get used to the heat in Cambodia.  Many expats, however,  choose to spend the hot season somewhere else.  Please, a mention of such places they may go?

Thanks everyone!

If you're full time in a country, you soon get used to the weather, and how to cope with it.
I find I still get very hot, but take a lot of showers - problem solved.

Thanks!