Within the Tribulation, earth and people will be burned with fire:
Revelation 8:7 The first sounded, and there followed hail and fire, mixed with blood, and they were thrown to the earth. One third of the earth was burned up, and one third of the trees were burned up, and all green grass was burned up.
Revelation 16:8-9 The fourth poured out his bowl on the sun, and it was given to him to scorch men with fire. (9) People were scorched with great heat, and people blasphemed the name of God who has the power over these plagues. They didn’t repent and give him glory.
Before the return the Mother of All Harlots is destroyed by fire:
Revelation 17:16 The ten horns which you saw, and the beast, these will hate the prostitute, will make her desolate, will strip her naked, will eat her flesh, and will burn her utterly with fire.
Revelation 18:8 Therefore in one day her plagues will come: death, mourning, and famine; and she will be utterly burned with fire; for the Lord God who has judged her is strong.
Revelation 19:3 A second said, “Hallelujah! Her smoke goes up forever and ever.”
Revelation 19:20 The beast was taken, and with him the false prophet who worked the signs in his sight, with which he deceived those who had received the mark of the beast and those who worshiped his image. These two were thrown alive into the lake of fire that burns with sulfur.
Then when the great battle against Jerusalem takes place, Zechariah 14:1-12, Isaiah 29:1-6, etc.
Revelation 20:9-10 And they went up on the breadth of the earth, and compassed the camp of the saints about, and the beloved city: and fire came down from God out of heaven, and devoured them. (10) And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet are, and shall be tormented day and night for ever and ever.