Sorry just for clarity we are the first option on their fire plan. Which makes sense most of the time but it just happens that we are both in "catastrophic" at the same time. We are heading to a safe place tomorrow but the "risk" for them driving to ours is possibly not worth it. It is hard to weigh up though which is why some specific advice would be really helpful.
I know there are no "failsafe" options and weighing up the risks isn't as straightforward as it may seem

No one has a crystal ball which is unfortunate