Not saying your prefs are wrong but just fyi: hot drinks are best in hot weather, people who live in the desert (arabs, nomads for example) have traditions where they drink coffee or tea at high noon very hot. Same with cold weather, iced drinks and ice cream are best when the weather is cold.

The reason they told me is that your sensitivity to temperature is relative to your internal temp. Drinking a hot drink raises your internal temp, reducing the relative gap with the outside temp and therefore making you feel less hot. Salty food and hydration are adequate to let your body naturally stabilze to the temperature. Of course there are limits.

I'm not drinking hot drinks on a 40C day. I'm sure this is fine for milder temps, but when you're in heatstroke heat temps for multiple days, this advice can't be right.

I've heard that the inverse is true in humid areas, and I live in the subtropics (the North-East area of New South Wales, Australia).