Witness Account of Ancient Asteroid Destruction?

From: http://www.timesonline.co.uk/tol/news/uk/science/article3649054.ece
A clay tablet that has baffled scientists for 150 years has been identified as a witness’s account of the asteroid suspected of being behind the destruction of Sodom and Gomorrah. Researchers who cracked the cuneiform symbols on the Planisphere tablet believe that it recorded an asteroid thought to have been more than half a mile across...He said the size and route of the asteroid meant that it was likely to have crashed into the Austrian Alps at Köfels. As it travelled close to the ground it would have left a trail of destruction from supersonic shock waves and then slammed into the Earth with a cataclysmic impact. Debris consisting of up to two thirds of the asteroid would have been hurled back along its route and a flash reaching temperatures of 400C (752F) would have been created, killing anyone in its path. About one million sq km (386,000 sq miles) would have been devastated and the impact would have been equivalent to more than 1,000 tonnes of TNT exploding. Dr Hempsall said that at least 20 ancient myths record devastation of the type and on the scale of the asteroid’s impact, including the Old Testament tale of the destruction of Sodom and Gomorrah and the Ancient Greek myth of how Phaeton, son of Helios, fell into the River Eridanus after losing control of his father’s sun chariot.

http://blog.beliefnet.com/feilerfaster/2008/05/did-an-asteroid-cause-sodom-an.html had some more details, and brought up something I had not previously heard:

Wikipedia says:
An alternative theory, first suggested in 1882, is that the Great Chicago Fire was caused by a meteor shower. At a 2004 conference of the Aerospace Corporation and the American Institute of Aeronautics and Astronautics, engineer and physicist Robert Wood suggested that the fire began when Biela's Comet broke up over the Midwest and rained down below. That four large fires took place, all on the same day, all on the shores of Lake Michigan (see Related Events), suggests a common root cause. Eyewitnesses reported sighting spontaneous ignitions, lack of smoke, "balls of fire" falling from the sky, and blue flames. According to Wood, these accounts suggest that the fires were caused by the methane that is commonly found in comets.
http://en.wikipedia.org/wiki/1871_Great_Chicago_Fire

And then there is the Hindu Mahabharata narrative, which records:
Gurkha flying in his swift and powerful Vimana hurled against the three cities of the Vrishis and Andhakas a single projectile charged with all the power of the Universe. An incandescent column of smoke and flame as bright as the thousand suns rose in all its splendor. An iron thunderbolt, a gigantic messenger of death, which reduced to ashes the entire race of the Vrishnis and the Andhakas. The corpses were so burned as to be unrecognizable. The hair and nails fell out; pottery broke without apparent cause, and the birds turned white.... after a few hours all foodstuffs were infected.... to escape from this fire, the soldiers threw themselves in streams to wash themselves and their equipment..."

A discussion with other references and an alternate explanation can be found here:

http://www.americanchronicle.com/articles/68842