Yes put them all in the refrigerator. Bulk will be fine for sure, well as long as power is restored within an hour or two. Regarding those that are already proofing, those are a little dicey. But the Modern is more forgiving. If the loaves “over proof” then simply dump them out on your work bench, oats and all. Reshape them and let them proof again. I demonstrated this Friday with our bakers. Loaves turn out quite well.