Choose a combination of supplies that suits your family including a first aid kit, non-perishable food such as canned goods, a can opener and plenty of clean drinking water. Pack a torch and batteries, as well as a wind-up or solar-powered torch. Toiletries are important to maintain your hygiene so include an appropriate range. Snap lock bags, garbage bags and even cling wrap can be handy for many different reasons.
Keep everything safe and secure in a large waterproof container with a sturdy lid. This will make your kit easy to transport and ensure everything inside it won't get wet or damaged.