After using laptops in several countries, I've found that no matter what platform you're on, the hotter the climate, the noisier the fans will be as they work to keep the processor cool... this is with both macbooks and pc laptops...
example - living in Australia for half of last year, it was that hot over there that my fans would kick in after an hour or two and stay on screaming, this was followed by a gradual slowing down of the whole computer and random crashes. I went and bought a
cooling pad that solved the slowing down problem, but added more noise. The one I bought was neither subtle or quiet but immediately solved all system issues. (I'm sure there are quieter/better pads on the market though)
On the other foot - while in Toronto, I didn't need any cooling whatsoever as it was that damn cold
Hardly heard my fans kick in ever, system(s) worked fine
I'm no expert - this is just my personal experience
