Household Readiness for Power and Water Interruptions

A practical, non-alarmist guide to keeping a home running through a short interruption of electricity or water — written for people who have never thought about it before, and who would rather not buy anything complicated.

Why short interruptions matter more than long ones

Almost everything written about preparedness concerns itself with the rare, enormous event. That is the wrong end of the problem for most households. The interruptions that actually happen are small, local and brief: a storm takes a line down, a water main is replaced, a substation trips on the hottest afternoon of the year. They last a few hours, sometimes a few days, and they are over before anyone outside the neighbourhood hears about them.

These are easy to prepare for, which is exactly why so few people do. A long catastrophe feels too large to act on, so it gets postponed indefinitely. A two-day outage feels too small to bother with, so it gets postponed too. The result is that the ordinary interruption — the one that is genuinely likely — catches households with nothing in place.

The good news is that the measures which carry a home through two days are the same ones that carry it through two weeks. Nothing in this guide is specialised. Most of it costs very little, and a good part of it costs nothing at all.

Understanding what actually stops working

When people imagine a power cut, they picture darkness. Darkness is the least of it, and it is the easiest thing on this list to solve. The useful exercise is to walk through a home and ask of each thing in turn: what does this depend on?

The order things fail in

A rough sequence holds for most homes, and knowing it tells you where to put your attention:

• Immediately: lighting, anything with a motor, the internet router, electric cooking, electric heating and air conditioning. Cordless phones die; a mobile network may stay up for a while on its own batteries.
• Within an hour or two: the mobile phones themselves, unless there is a way to charge them.
• Within four to six hours: the refrigerator, if the door stays shut. A full freezer holds considerably longer than an empty one.
• Within hours to a day: hot water, once the tank cools.
• Variable, and often overlooked: water itself. Homes on a private well lose water the moment the pump loses power. Homes on a municipal supply usually keep pressure for a while, but pressure can fall or a boil notice can be issued if pumping stations are affected.
• Within a day: the heating, in the sense that the house has cooled to the point where it is noticeable. In cold weather this moves much faster.

Notice how many of those are not about electricity at all. They are about water and temperature, and they are the ones that make a house genuinely unpleasant to stay in.

Water pressure and wells

This is the single most important thing to establish about your own home, and most people do not know the answer: if the power goes out, do you still have running water?

If your home draws from a private well, the answer is almost always no. The pump is electric. There may be a small pressure tank that gives you a few minutes of flow, and then nothing. If your home is on a municipal supply, you will usually keep water for some time, because the system is pressurised by elevation or by pumps with their own backup — but this varies enormously between water systems, and upper floors lose pressure first.

Find out which applies to you before you need to know. It changes everything about how much water is worth keeping on hand.

Heating, cooling and cooking

Many heating systems that burn gas or oil still need electricity to run the controls, the fan or the circulating pump. A gas furnace with an electric blower will not heat the house without power. A gas stove with electric ignition can often still be lit by hand; a modern one with an electronic control panel usually cannot. These details are specific to the appliance, and the time to check them is on an ordinary afternoon, not in the dark.

Water: storage, use and treatment

How much a household actually uses

Figures for drinking water are widely quoted and widely misunderstood. Roughly two litres of drinking water per person per day is a reasonable planning figure in temperate conditions, more in heat or with physical exertion. But drinking is not what consumes the water in a household.

Cooking, washing hands, basic hygiene, cleaning, and flushing a toilet add up far faster than drinking does. A single conventional toilet flush uses more water than a person drinks in a day. Any plan built only on drinking water will fail at the first meal and the first trip to the bathroom.

A more useful way to think about it: plan drinking water by the person, and plan everything else by the task. How many times will this household cook? Wash? Flush? Those numbers are what fills the containers.

Storing water safely

Stored water does not spoil on its own. What spoils it is what grows in it, and that is a matter of what went in, what the container is, and where it sits.

• Use food-grade containers. Containers sold for water or for food are made of plastics intended to hold it. A container that previously held anything else should not be reused.
• Fill from a treated supply where possible, and fill containers that are clean and have been rinsed.
• Keep it dark and cool. Light encourages algae; heat encourages everything else. A cupboard is better than a windowsill, and a cool floor is better than a warm attic.
• Rotate it. Label the container with the date it was filled and replace it periodically. Written dates are the only system that survives contact with real life.
• Keep it off bare concrete if you are storing for a long period; a board or a mat underneath is the usual advice.

There is also water already in the house that most people forget: the hot water tank holds a considerable quantity, and it is clean. Knowing how to isolate and drain it safely — before you need to — is worth ten minutes of reading your appliance's manual.

Treating water when the source is uncertain

If the supply has been interrupted, or a notice has been issued, water that looks perfectly clear may not be safe to drink. The common household approaches are:

• Boiling is the most reliable method available in an ordinary kitchen, provided there is a way to heat water. It deals with biological contamination but does nothing about chemical contamination.
• Filtration covers a wide range of products with a wide range of capabilities. What a filter removes depends entirely on the filter; read the specification rather than the packaging.
• Chemical treatment using products sold for the purpose, applied strictly according to their instructions.

Cloudy water should be allowed to settle and be strained through a clean cloth before any of these. And when a local authority issues guidance about the water supply, that guidance is specific to what has actually happened and takes precedence over any general advice, including this page.

Food that does not depend on power

What keeps without refrigeration

The practical question is not "what food lasts forever" but "what can this household eat for three days without opening the refrigerator". That is a much easier question, and the answer is already partly in the cupboard.

Tinned fish, tinned beans and vegetables, tinned fruit, peanut butter, rice, pasta, oats, crackers, dried fruit, nuts, honey, shelf-stable milk, instant coffee. These are ordinary groceries. The only thing that distinguishes a prepared household from an unprepared one is having slightly more of them than this week requires, and knowing where they are.

Two practical details are easy to miss. The first is a manual tin opener — an embarrassing thing to discover you do not own. The second is that some of the calories should be things people will actually eat without cooking, cold, in a dim kitchen, in a bad mood. Morale is a real factor, and it is cheaper to plan for than to repair.

Rotation and record keeping

Food set aside and forgotten is money thrown away. The approach that works is the one shops use: new stock goes behind, old stock comes forward, and you eat from the front. If the reserve is simply a deeper version of the food you normally eat, rotation happens by itself and nothing is ever wasted.

Dates on packaging are an indication of quality rather than a cliff edge for most shelf-stable goods, but tins that are rusted, dented along a seam, leaking or swollen should be discarded without opening.

Cooking without the stove

This is where plans most often break. A household with three days of food and no way to heat it has three days of cold food.

Options depend on the home. A gas hob that lights with a match, a camping stove used outdoors, an outdoor grill. The critical safety rule admits no exceptions: anything that burns fuel must never be used indoors unless it was specifically designed and installed for indoor use. Camping stoves, grills and generators produce carbon monoxide, which cannot be seen or smelled, and public health agencies consistently identify carbon monoxide poisoning as a leading cause of death in the days following storms and power outages. A working carbon monoxide alarm is inexpensive and belongs in every home that burns anything.

Light, heat and information

Lighting a home without mains power

Battery lighting has become so cheap and so good that there is little reason to consider anything else for general use. A head torch is worth more than several hand torches, because it leaves both hands free — which matters when the task is cooking, or finding the stopcock, or carrying a child.

Candles deserve a word of caution. They are the traditional answer, and fire services routinely report candle fires during outages, particularly when people are tired and moving around an unlit house. If candles are used, they belong in stable holders, away from anything that can catch, and they go out before anyone sleeps.

Staying warm in a cold house

A house without heating cools gradually, and the strategy that works is not to heat the house but to heat the people, and then to heat one room.

Layers of clothing trap air and are more effective than a single heavy garment. A hat matters more than most people expect. Closing doors to unused rooms, drawing curtains after dark, and gathering the household into one room with the smallest exterior wall area concentrates whatever warmth remains. Sleeping bags and extra blankets are more useful than any heating appliance that needs power.

In genuinely severe cold, the correct answer may be to leave and go somewhere heated. Knowing in advance where that would be — a relative, a friend, a public warming centre — is part of the plan.

Keeping informed when the network is down

Mobile networks often stay up during outages, but phones do not. A power bank kept charged, or the ability to charge from a vehicle, turns a phone from a dead rectangle into a working link. Reducing screen brightness and turning off everything that is not needed extends a battery dramatically.

A battery or wind-up radio remains the most reliable way to receive public information when nothing else works, and costs very little. Local radio is where local emergency information actually appears.

Sanitation and health

When the toilet stops flushing

This is the part of the subject nobody wants to discuss, and the part that makes households give up and leave. It is worth thinking about once, calmly, in advance.

If the water supply is interrupted but the drains are intact, a toilet can usually be flushed by pouring water into the bowl — which is a legitimate use for water that is not clean enough to drink, such as collected rainwater. If the drains are not intact, or if there is a risk of sewage backing up, that option is gone, and the answer is a lined container with a sealing lid and an absorbent material, kept and disposed of sensibly.

Alongside that: hand washing matters more during an interruption than at any other time, because illness spreads quickly in a household with limited water. Soap, a small amount of water, hand sanitiser as a supplement, and a supply of bin liners and wipes cover most of it.

Medication and the cold chain

Any household member who depends on refrigerated medication, on a powered medical device, or on a regular prescription should have a specific plan — one discussed with a pharmacist or doctor in advance, not improvised. This includes knowing how long a particular medication tolerates being warm, and what the local arrangements are for an emergency supply.

A basic first-aid kit, and some idea of how to use it, rounds this out. Minor injuries become more likely in an unlit house with unfamiliar routines.

Making a household plan

Writing it down

A plan that lives in one person's head is not a plan, because that person may be at work. The useful version is a single sheet of paper, on the refrigerator or in a drawer everyone knows about, carrying:

• Where the water shut-off, the main electrical switch and the gas shut-off are, and how to operate them.
• Where the torches, the radio and the water are kept.
• Phone numbers written out, because nobody remembers a number any more and a dead phone takes its contacts with it.
• Where the household will go if the house becomes unsuitable, and how members will contact one another if they are apart.
• Anything specific to this household: a medication, an animal, a person who needs help moving.

Practising it once

An evening with the main switch off is the cheapest test available, and it finds the gaps nothing else will: the torch with dead batteries, the tin opener that does not exist, the fact that the bathroom has no window and is completely dark at four in the afternoon. Two hours of mild inconvenience, once, is worth more than any amount of reading.

A practical household checklist

Nothing here is urgent and nothing here is expensive. Spread across a few weeks, it is barely noticeable.

Frequently asked questions

A measured conclusion

Preparedness has an image problem. It is associated with fear, with stockpiling, and with an attitude towards the world that most people do not share and do not want to. None of that is necessary, and none of it is what this guide has described.

What has been described is closer to ordinary household competence: knowing where the shut-off valve is, keeping a little more food than this week needs, owning a torch that works, and having talked once about what everyone would do. These are the same instincts that lead people to keep a spare tyre and a first-aid kit. They are unremarkable, and they are the difference between an interruption being an inconvenience and being a crisis.

Start with the single question at the top of this guide — whether your taps run when the power does not. Whatever the answer turns out to be, you will know something about your own home that you did not know this morning, and the rest follows from there.