In Genesis 19:23-29 Sodom and Gomorrah are destroyed. Just as God destroyed the world with water in the flood, so too he destroyed Sodom and Gomorrah by fire. Though this was a unique event, it foreshadows the future judgment to come on the last day and is a warning to repent before the day comes. The passage teaches that what is needed is an intercessor like Abraham. This is what we have in Christ.