So is heaven temporary too? Is it destroyed after the Last Judgment?
The lake of fire IS hell.
"The Son of Man shall send out His angels, and they shall gather out of His kingdom all things that offend, and those who do iniquity, and shall cast them into a furnace of fire. There shall be wailing and gnashing of teeth."
(Mat 13:41-42)
"So it shall be at the end of the world. The angels shall come out and separate the wicked from among the just, and shall cast them into the furnace of fire. There shall be wailing and gnashing of teeth."
Mat 13:49-50
"Then he will say to those on his left, 'Away from me, you that are under God's curse! Away to the eternal fire which has been prepared for the Devil and his angels!"
"These, then, will be sent off to eternal punishment, but the righteous will go to eternal life."
(Mat 25:41 & 46)
"And if your foot offends you, cut it off. It is better for you to enter into life lame than to have two feet to be cast into hell, into the fire that never shall be quenched where
their worm dies not, and the fire is not quenched."
(Mark 9:45-46)
"And in hell he lifted up his eyes, being in torments, and saw Abraham afar off, and Lazarus in his bosom. And he cried and said, Father Abraham, have mercy on me and send Lazarus so that he may dip the tip of his finger in water and cool my tongue, for I am tormented in this flame."
(Luke 16:23-24)
"He who believes on Him is not condemned, but he who does not believe is condemned already, because he has not believed in the name of the only-begotten Son of God. And this is the condemnation, that the Light has come into the world, and men loved darkness rather than the Light, because their deeds were evil."
(John 3:18-19)
" - in flaming fire taking vengeance on those who do not know God and who do not obey the gospel of our Lord Jesus Christ, who shall be punished with everlasting destruction from the presence of the Lord and from the glory of His power, ...."
(2Th 1:8-9)
"And a third angel followed them, saying with a great voice, If anyone worships the beast and its image, and receives a mark in his forehead or in his hand, he also will drink of the wine of the anger of God, having been mixed undiluted in the cup of His wrath. And he will be tormented by fire and brimstone before the holy angels, and in the presence of the Lamb. And the smoke of their torment goes up forever and ever. And they have no rest day or night, those who worship the beast and its image, and whoever receives the mark of its name."
(Rev 14:9-11)
"And if anyone was not found having been written in the Book of Life, he was cast into the Lake of Fire."
(Rev 20:15)
"But the fearful, and the unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, will have their part in the Lake burning with fire and brimstone, which is the second death."
(Rev 21:8)