It is narrated from Sayyiduna al-Mughirah bin Shu'bah (may Allah be pleased with him) that he said: We used to offer the Zuhr prayer with the Messenger of Allah (peace and blessings be upon him) at midday (in the intense heat). He (peace and blessings be upon him) said to us: "Pray the prayer when it has cooled, for the intensity of the heat is from the breath of Hell."
Abu Isa al-Tirmidhi said, according to what has reached me from him: I asked Muhammad (al-Bukhari) about this hadith, and he counted it as mahfuz (preserved).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2068
It is narrated from Ibn Abi Mulaykah that Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) came to Makkah. He heard the voice of Sayyiduna Abu Mahdhurah (may Allah be pleased with him) and said: Woe to him, how loud his voice is! Does he not fear that his throat will burst? Then Sayyiduna Abu Mahdhurah (may Allah be pleased with him) came to him to inform him of the prayer, and he said: Woe to you, how loud your voice is! Do you not fear that your throat will burst? Sayyiduna Abu Mahdhurah (may Allah be pleased with him) said: O Commander of the Believers, I raised my voice only because of your arrival. He (may Allah be pleased with him) said: Your land is hot, so lead the people in prayer when the day has cooled a little. He said this two or three times (that is, offer the prayer in the cooler time). Then (when the intensity of the weather has lessened) give the call to prayer, then come down and offer two rak'ahs, then say the iqamah.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2069