Is it true that the fire we use in cooking is the smoke of the fire of Hell (may Allah protect us from it)?
This is not true. Yet, the Prophet (peace be upon him) said,
When it is intensely hot, then wait until it cools down before you pray, for intense heat is from the intensity of the heat of Hell.
Muslim and the Compilers of the Sunan [Abu Dawud, Ibn Majah, Al-Tirmidhy and Al-Nasa'y])
Moreover, the Prophet (peace be upon him) said, (Part No. 3; Page No. 494)
“This (worldly) fire of yours which you use is one of seventy parts of the Hell.” They said, “O Messenger of Allah! It (the fire of this world) would have been sufficient (as a punishment).” He said, “It (Hellfire) is made to surpass (worldly fire) by sixty-nine parts, each of them is as hot.”
May Allah grant us success. May peace and blessings be upon our Prophet
Muhammad, his family, and Companions!