In Genesis 18:27, this signifies the humility of the Lord's human as to its quality. (Arcana Coelestia 2265)

In Exodus 9:8, this signifies lustful falsities excited by the presence of infesting spirits. (Arcana Coelestia 7519, Apocalypse Explained 962[8])

In Ezekiel 27:30, this signifies something condemned, because the fire from which they come signifies infernal love. (Apocalypse Explained 441)

In Jeremiah 6:26, this signifies mourning because of the destruction of good and truth in the church. (Arcana Coelestia 637[9])

(Verweise: Apocalypse Explained 1175)

6314. As it is with light, so it is with the heat that is vital to a person's existence. In no way at all does that vital heat originate in the heat radiated by the sun in the world; rather, it originates in spiritual heat, which is love and radiates from the Lord. This heat is what angels have. Consequently the amount of vital heat a person has is determined by the amount of love he has. His body however is warmed by worldly heat, as is his sensory awareness within it; yet vital heat flows into that worldly heat and imparts life to it. Differences in the purity and intensity of this heat are akin to variations in the clarity of the light. This vital heat is what one should understand by the holy fires mentioned in the Word, and therefore heavenly loves are meant by those fires. But in a contrary sense that worldly heat is what one should understand by the fires of hell, and therefore hellish loves and the desires that go with them are meant when these fires are mentioned in the Word.