People often refer to “fire-and-brimstone preachers” without knowing just what brimstone it. It is an old name for sulfur, something common in volcanic areas. When Genesis reports that God destroyed the immoral cities of Sodom and Gomorrah with fire and brimstone, it may be referring to a volcano (Gen. 19:24).
The book of Revelation says that at the end of the world Satan and all nonbelievers will be cast into a lake of fire and brimstone where they will burn eternally (Rev. 14:10; 19:20, 21:8). This is why “fire and brimstone” is another way of saying “the fires of hell.”
