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Published on Nov 6, 2006
Rotating 'Wall cloud' structure lowers to the ground again after dissipation of the tornadic swirl. Fire fighters get word from teams closer to the fire that 'full grown trees were being uprooted'. The fire tornadoes caused F3 like damage upon later investigations, flipping over cars of emergency teams that were abandoned due to the growing fire. This is shot by an emergency team as fire fighters watch in disbelief. Fire fighters have died in these events before.
A fire whirl is a phenomenon in which a fire, under certain conditions (depending on air temperature and currents), acquires a vertical vorticity and forms a whirl, or a tornado-like effect of a vertically oriented rotating column of air. Fire whirls may be whirlwinds separated from the flames, either within the burn area or outside it, or a vortex of flame, itself.
AND THE WIKI SAYS :(To be taken with some reserve) A fire whirl can make fires more dangerous, an extreme example is the 1923 Great Kantō earthquake in Japan which ignited a large city sized firestorm and produced a gigantic fire whirl that killed 38,000 in fifteen minutes in the Hifukusho-Ato region of Tokyo. Another example are the numerous large fire whirls (some tornadic) that developed after lightning struck an oil storage facility near San Luis Obispo, California on April 7, 1926, several of which produced significant structural damage well away from the fire, killing two. Thousands of whirlwinds were produced by the four day long firestorm coincident in an environment that produced severe thunderstorms, in which the larger fire whirls carried debris 5 kilometers (3 mi) away http://en.wikipedia.org/wiki/Fire_whirl