Why the noon prayer is delayed in heat
A reason given that is not about comfort.
وَاشْتَكَتِ النَّارُ إِلَى رَبِّهَا فَقَالَتْ يَا رَبِّ أَكَلَ بَعْضِي بَعْضًا. فَأَذِنَ لَهَا بِنَفَسَيْنِ نَفَسٍ فِي الشِّتَاءِ، وَنَفَسٍ فِي الصَّيْفِ، فَهُوَ أَشَدُّ مَا تَجِدُونَ مِنَ الْحَرِّ، وَأَشَدُّ مَا تَجِدُونَ مِنَ الزَّمْهَرِيرِ
The Fire complained to its Lord and said: my Lord, part of me has consumed another part. So it was permitted two breaths, one in winter and one in summer.
The full narration
Narrated Abu Huraira:The Prophet (ﷺ) said, "In very hot weather delay the Zuhr prayer till it becomes (a bit) cooler because the severity of heat is from the raging of the Hell-fire. The Hell-fire of Hell complained to its Lord saying: O Lord! My parts are eating (destroying) one another. So Allah allowed it to take two breaths, one in the winter and the other in the summer. The breath in the summer is at the time when you feel the severest heat and the breath in the winter is at the time when you feel the severest cold
Source
Ṣaḥīḥ al-Bukhārī · 536
- Agreed upon as authentic (al-Bukhārī / Muslim)