For years the standard civilian message was seventy-two hours of supplies, on the assumption that outside help arrives on the fourth day. Grid specialists who work on long-duration blackouts have argued that a damaged bulk system does not behave like an ice storm. If the scarce part is a transformer, the calendar changes.

An ice storm is mostly spans, poles, and crews, with replacement parts that are ordinary. A long blackout whose scarce part is a transformer is a factory problem. Help can be real, nearby, and funded, and still have nothing of the right size to install. The fourth-day assumption is an assumption about the damage, not about whether responders care.

Two weeks of water, shelf-stable food, prescriptions, and a way to hear official instructions is a more honest floor for anyone who can afford the space. Past that, the problem becomes community: who has a generator and fuel discipline, who can purify water, who checks on the neighbor who uses powered medical gear.

Space is a constraint, not a moral score. A house can store water an apartment cannot. The more honest floor — water, shelf-stable food, prescriptions, and a way to hear official instructions — bends to the room you have. It does not bend into a random pile. What fits has to be the things the people in that household will actually use.

Stockpiles fail when they are random. The useful version is a list tied to the people in the house and the season you are actually in.

Past two weeks, “community” means a short roster. Who can run a generator without burning the fuel in a night. Who has already practiced purifying water. Who will check the neighbor whose medical gear stops being optional when the outlet stops. A roster that has never been said out loud is a hope.

Build the list from the people and the season, then buy. Winter adds warmth. Heat adds water. A child, an infant, a pet, or a drug that must stay cold adds a line no generic kit includes. The other order — buy a picture of preparedness, then discover nobody will eat it — is how stockpiles fail.