'Flaming Fire' in the Bible

and say to the scrub land of the Negev, 'Hear the word of the Lord: This is what the sovereign Lord says: Look here, I am about to start a fire in you, and it will devour every green tree and every dry tree in you. The flaming fire will not be extinguished, and the whole surface of the ground from the Negev to the north will be scorched by it.