HK heat is no joke, I remember deciding to hike Victoria Peak about 5 years ago.
The moment I stepped outside my airbnb room, I was hit in the face with the epic humidity.
Never in my life have I drenched my backpack in sweat from such a short "hike".
Even Vancouver's heat wave last year, 40C, was not as bad as HK humidity + heat. I think you need to be born in that climate to be "useto it"