I don't think we need to wait, there is plenty of observable physical evidence to discuss. regardless of whether this is a natural causes or an act of war, either way the people responsible for the response to this catastrophe should be fired. Regardless of what they want to say as a defense it is undeniable that the outcome could not have possibly been worse. As far as the police chief goes, one mass murder can be bad luck, two should mean that you are not cut out for this job. He should be relieved of duty and investigated.
The book of revelation compares the spirit of Antichrist to Caesar Nero, so if this fire was an attempt to be able to buy up this land at a small fraction of what it was worth prior to the fire, then not only should we be concerned about corruption but also with the Spirit of Antichrist operating.
I have not heard a decent explanation for why the siren wasn't sounded and we don't need to give them more time to fabricate some story. It is easy to confirm when the electricity was turned off and when the last devastating fire started. If the fire didn't start with a power line then the next best explanation for that bright light which stated it will be a laser from a satellite.
It is very important to demand questions be answered early in the investigation because if they change their story it is very telling. Already they have changed virtually everything about the story.