things very rarely ever "just happen" without someone at least having the chance to affect those things at some point. it's not like a fucking meteor came from outer space and took it all out in an instant. there are obviously things you can do or not do to prepare for fires.  they did not do the correct things. either because they were incompetent and didn't think of them at all, or because they did think of them and then wrongly decided that the risk was too small to spend resources on.
Canada