I think we have a good stockpile with loads of tins, water, biscuits, we have also filled up water bottles and will recycle the water regularly to keep it fresh. When whatever happens, happens we will fill up all the sinks, bath, extra water bottles, all of our pots and pans, jugs, mixing bowls and even vases.
This should give us extra water to drink or give our cats, flush the toilet or for washing dishes or ourselves.
I think having extra pasta and rice will require a lot of water to boil, you could make stock, use soups, passata, tinned vegetables water to cook with.
I think it would be good to have a family plan in place before so you know if there is an event that for example, one person picks up child/children, would it make more sense for everyone to go to a house that is more suitable e.g. log burner, great stockpile, enough space for everyone, maybe access to a stream? Bring everything with you. Check on elderly neighbours and relatives.
I also charge my power banks up regularly and the rechargeable batteries for anything. I have asked my family to get cash in small notes and keep their cars filled with petrol too.