The cause of the fire is not the issue. It's its severity and ability to spread which is caused by having a lot of dry fuel on the ground.
Rumpy, how do I get through to you?
Did you bother to read in full the link I posted #7554......It indicates the severity of fires since 1825.....the areas which were burnt, the lives and buildings lost...
Please read it in full and please do not come back saying you do not understand or with some unworthy comment.