Tornado destroys, fire burns identifies cause and effect.
One process, the cause, is responsible for the second, the effect, and the second is, in turn, dependent on the first. In each pair, the cause is given first the effect later.
Tornadoes generally leave destruction in their wake: they destroy houses, crops and even take lives. Fire burns or melts everything in its way at the right temperature. Few materials are not affected by it.
