'Fire' in the Bible

And sent destruction on Sodom and Gomorrah, burning them up with fire as an example to those whose way of life might in the future be unpleasing to him;

But the heavens and the earth, which are now, by the same word are kept in store, reserved unto fire against the day of judgment and perdition of ungodly men.

But the Day of the Lord will come like a thief. On that day the heavens will disappear with a roaring sound, the elements will be destroyed by fire, and the earth and everything done on it will be exposed.

Looking for and hasting unto the coming of the day of God, wherein the heavens being on fire shall be dissolved, and the elements shall melt with fervent heat?