If the cable would indeed snap, I can guarantee that it will be supported by the next column. It will have built in redundancies so if indeed it did snap, it wouldn't cause park wide disaster.
And like Kaz said, them cables could smash a few things, kill a few plants, but no huge damage.
I completely agree that the damage wouldnt be too bad.
However regarding the cable being supported by the next column id just like to give my thoughts on that. The cable above the gardens is a hell of a lot heavier than the weight of the cable between the supports in ugland (for example) purely because of the fact that there is a large distance between the supports. Therefore (unless the wire is held on the supports from above the wheels which by the looks of Kaz's picture it doesnt appear to be) then if the wire was to snap, it would simply fall to the ground in the gardens pulling the cable from other places of the wire into the gardens. Unless this happened very violently then it would remain on the supports until the end of the wire reached the last support where it would then fall to the ground in the gardens (thus causing little or no damage to other areas of the park other than the gardens). However by the looks of it, the wire hasnt snapped or broke luckily.
Im not saying i am right as i am no engineer but this is just how i see it happening :D
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Theres alot of speculation going round at the momment that it could very well be the vending machines or arcade machines which have caused the fire.
In this case, and if it is these could we see these being removed from the park incase it happens in the near future to any other of the attractions?
Yes i would hope they were removed or at least checked. They are in the stations or near the rides on a few of the rides. Including -
Skyride (fv station)