I'm not an expert on this sort of thing, but I wanted to send you my well wishes, as this must be quite a stressful time.
It sounds like you are handling things quite well enough. Good for you for not going out to get gas at 2am...that could be dangerous for all sorts of other reasons besides fires!
It sounds like you are doing all the necessary prep work, so I don't think there's much else you can do at this point except hope for the best. But that's the problem with us OCDers, eh? We always want to be doing something.
Good luck with everything.