وَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ : " أَبْرِدُوا مِنَ الْحَرِّ فِي الصَّلَاةِ ، فَإِنَّ شِدَّةَ الْحَرِّ مِنْ فَيْحِ جَهَنَّمَ " .
And the Noble Prophet (peace and blessings be upon him) said: The intensity of heat is from the effect of the heat of Hell, so perform the prayer when it becomes cooler.