ISA being 15 Celsius at Sea Level, lets assume the platform altitude is 2000ft AMSL where the runway elevation is practically at sea level.
For every 10C increase above ISA your height is increased by 4% and so at 40C as in Dubai you would use the following example.
40C - 15C or actual temp - ISA = +25C to ISA
+25C is made up of 10+10+5 or 4% + 4% +2% or 10% increase to your real actual altitude AMSL or Airfield altitude in this case.
So if, at 40C, you were servo altitude 2000ft then your real altitude would be 2200ft or +10% of the 2000ft servo altitude.
The NPA path angle in Dubai eg RNAV is deliberately 2.8 degrees so that in the majority of the hot weather, you are really 2200ft AMSL with your servo altitude at 2000ft. Now here is the trick, this now puts you 10% above the 2.8 degree approach path angle or thats 2.8 degrees +10% = 3.08 degrees or almost a normal stable approach path angle.
An ILS will always keep you on a 3degree angle if appropriate. Should a hot climate NPA set 3 degree app path angles, then on a 40 C day, you would be looking at a 3.3 degree approach, possibly becoming unstable and not understanding what's happening.
Long answer sorry, hope that helped.
Edit:- the continual 10% increase to your servo altitude, ie you are always 10% above that indicated on the servo altimeter (at 40 C), washes out down the approach, ie at 1000ft + 10% = 100ft higher and at 500ft only 50ft higher.
Rgds
Jack