According to a Cuneiform clay tablet known as the "Planisphere", an asteroid struck Kofels, Austria June 29, 3123 BC. The tablet was discovered approximately 150 years ago and finally, researchers have managed to decode its information. It is a copy of a Sumerian astronomer's night diary and contains drawings of known constellations.
The amount of destruction and the timing of the catastrophe may account for the destruction of Sodom and Gomorrah. It came in a very low angle, approximately 6° and clipped the mountain Gamskogel, which caused it to explode. Therefore, there is no impact crater but it did cause an enormous landslide.
The "back plume" would have bent over the Mediterranean Sea, re-entering the atmosphere over Sinai and Northern Egypt. This would have cuased any flammable material, including human hair and clothing to ignite.
Of course, nothing has been proven but the Biblical passage of raining sulfur on Sodom and Gomorrah fits nicely with the asteroid theory.