If your food business is affected by a power outage:

check the temperature of your fridge and freezers
discard any meat, fish or dairy products that have fully defrosted in your freezer. Food that is still frozen can continue to be frozen once it is still below -18º C.
food stored in the fridge must be kept at 0-5º C. If it is likely that the temperature of the chilled food was above 5º C for longer than 4 hours it must be discarded.
before restocking with food, check the freezer and fridge units are working properly and are at the correct temperature. This is especially important where the power outage has been caused by flooding.

Remember, if in doubt, throw it out.