3 day power outage essentials: a safety first checklist
The essentials that make a blackout manageable are water, reliable light, backup phone power, and a basic first aid kit with a radio. Assemble these now and put your power bank on charge, before anything else, since that single step buys you light and communication the moment the lights go out. Aim for a 3-day supply as a baseline, and stretch that to 2 weeks of food and water if you live somewhere outages tend to run long.
TL;DR:
- A power bank capable of multiple phone recharges is essential, along with a solar panel for longer outages beyond a day or two.
- Generators must be placed outdoors at least 20 feet from any openings to prevent deadly carbon monoxide buildup inside the home.
- Food and water supplies should each last a minimum of three days, with up to two weeks recommended for regions experiencing prolonged outages.
- Keep refrigerator and freezer temperatures under control and discard any perishable food left above safe temperatures for more than four hours.
- Plan specifically for household members relying on medical devices, ensuring power backups are available and medications are stored properly during outages.
Table of Contents
- Core kit: what to assemble right now
- Food and water: quantities that actually last
- Power and charging: what your gear can actually run
- Safety first: generators and carbon monoxide risk
- Food safety: how long your fridge and freezer really last
- Medical devices and medication: planning the backup
- Pets and children: comfort during a stressful event
- Before, during, and after: the timed checklist
- Why curated, practical kit guidance matters
- Two small items that make a real difference for pets
- FAQ
- Sources
Core kit: what to assemble right now
A good outage kit is not complicated. It is a short list of items you can gather in an afternoon, each one solving a specific problem that comes up within the first hours of losing power.
Start with light. Torches and headlamps beat candles for safety and convenience, and a lantern gives you ambient light for a shared room. Keep spare batteries in a separate bag so you are not hunting for them by torchlight.
Power comes next. A power bank with enough capacity to recharge a phone multiple times is worth more than anything else in the kit once the sun goes down, and a small solar panel gives you a trickle of charge if the outage runs past a day or two.
For communication, a battery-powered or hand-crank radio matters because phone networks can become congested or lose signal entirely during a widespread power cut, and a radio keeps you connected to official updates without draining your phone. Keep a printed list of emergency contacts too, since a dead phone means a lost contact list.
Round out the kit with practical tools and comfort items:
- A first aid kit stocked with plasters, antiseptic, pain relief, and any personal medication.
- A multipurpose tool for small repairs and a manual can opener for tinned food.
- Blankets, a spare change of clothes, and a thermal flask for hot drinks when the heating is off.
Food and water: quantities that actually last
Water is the one item you cannot improvise. The standard guidance is 1 gallon, roughly 3.8 litres, per person per day, with a 3-day minimum and up to a 2-week supply recommended for home outages rather than evacuations.
Food is simpler than it sounds. You want things that need no cooking and no refrigeration, so they sit in a cupboard until needed and still taste fine when you open them.
- Ready-to-eat tinned goods such as beans, soups, and fruit.
- Protein bars, peanut butter, and dried fruit for quick energy.
- Disposable plates, cups, and utensils to save on washing up.
A manual can opener earns its place in both the food section and the toolkit, since an electric one is useless without power. For meals, think no-cook lunches: crackers with peanut butter, tinned fish, or a handful of nuts and dried fruit does the job without a stove.
Power and charging: what your gear can actually run
Power banks are rated in milliamp hours, or mAh, and that figure tells you how many times you can recharge a device before the bank itself runs flat. A phone battery typically holds somewhere between 3,000 and 5,000 mAh, so a 20,000 mAh power bank gives you roughly four to six full charges before it needs topping up itself.
Small portable power stations go further, running a lamp, a fan, or a laptop for a few hours, though they will not keep a fridge cold for long. Match the device to the task rather than assuming more capacity always solves the problem.
- Switch your phone to low-power mode and close background apps to stretch battery life.
- Use airplane mode when you do not need data, since searching for a weak signal drains power fast.
- Charge devices in a car when safe to do so, or use a solar charger for a slow top-up during daylight.
Pro Tip: Charge every device and power bank to 100% as soon as a storm warning or scheduled outage is announced, not after the lights go out.
Safety first: generators and carbon monoxide risk
Generators solve a real problem but create a serious one if placed badly. Portable generators must run outdoors, at least 20 feet, around 6 metres, from any door, window, or vent, because exhaust can seep back indoors even from that distance in some conditions, according to CDC guidance on carbon monoxide poisoning.
A small portable generator can produce carbon monoxide equivalent to several idling cars, which is why placement outdoors and away from openings is non-negotiable. Never run a generator, a camping stove, or a barbecue indoors or in a garage, even with the door open, since carbon monoxide is odourless and builds up quickly in enclosed spaces.
- Keep generators at least 20 feet from doors, windows, and vents at all times.
- Install battery-backed carbon monoxide detectors on every level of your home.
- Learn the symptoms of CO exposure: headache, dizziness, nausea, and confusion.
If a generator is not an option, a battery power station, a stay with friends who still have power, or a local community centre are all safer alternatives for the duration of a longer outage.
Food safety: how long your fridge and freezer really last
Once the power goes, the clock starts on your food. An unopened fridge keeps food cold for about four hours, and a full freezer holds its temperature for about 48 hours, dropping to roughly 24 hours if it is only half full, according to Ready.
Perishable food left above 40°F, around 4°C, for more than four hours should be thrown out, and thawed frozen food can be safely refrozen only if it still contains ice crystals, per CDC food safety guidance.
- Keep an appliance thermometer in the fridge and freezer so you are not guessing.
- Use a cooler packed with ice for anything you need to keep cold longer than a few hours.
- When in doubt, throw it out, starting with dairy, meat, and leftovers.
Once power returns, check temperatures before restocking, and photograph any spoiled food for an insurance claim if you carry cover for it.
Medical devices and medication: planning the backup
If anyone in your household relies on a CPAP machine, an oxygen concentrator, or refrigerated medication, plan for that specifically rather than folding it into the general kit. List every powered device, note its battery life, and contact the supplier or your medical provider in advance to ask about purpose-built battery backups.
Keep a written list of medications, dosages, and pharmacy contact details somewhere accessible, and find out how long each medicine remains safe unrefrigerated. Many utility providers offer priority registration for medically dependent households, and it is worth arranging a neighbour or family member who can help if you need to relocate equipment quickly.
Pets and children: comfort during a stressful event
Pets need their own small kit: food, water, bowls, a carrier, medication, and ID tags, kept near the household supplies rather than scattered around the house. A no-spill slow water feeder bowl is a practical addition, since it travels well and resists tipping if things get chaotic. For longer outages, a self-cleaning grooming brush helps keep a stressed, shedding pet comfortable without much effort.
For children, familiar comfort items and simple, low-tech activities such as cards or colouring help more than reassurance alone.
Before, during, and after: the timed checklist
Preparation works best as three distinct phases, each with its own short list of actions.
- Before: charge every device and power bank, fill your car’s fuel tank, freeze water bottles for extra cold storage, and unplug sensitive electronics as a precaution.
- During: keep the fridge door shut, use a radio for updates instead of draining your phone, run any generator outdoors only, and conserve battery wherever possible.
- After: unplug non-essential appliances before power returns to avoid surge damage, check fridge and freezer temperatures, discard anything that sat above a safe temperature too long, and restock your kit for next time.
Why curated, practical kit guidance matters
We put this guide together because most outage advice is either too vague to act on or too long to read before the power actually cuts out. Our approach across the marketplace is the same: curate items that solve a real problem, explain why they matter, and let you build a kit at your own pace using our blog resources and product pages as a starting point.
— Mr
Two small items that make a real difference for pets
A blackout is stressful enough without a spilt water bowl or a pet that will not settle. The no-spill slow water feeder bowl, a 35oz travel-sized design, holds water steady even if it gets knocked, which matters when you are moving around the house by torchlight. The self-cleaning grooming brush gives a nervous or shedding pet some calm, hands-on attention during a stressful stretch at home.
- No-spill slow water feeder bowl: steady, travel-ready water for cats and dogs during outages.
- Self-cleaning grooming brush: quick deshedding that keeps pets comfortable when routines are disrupted.
You can browse the full range on our marketplace collections page to round out the rest of your kit.
FAQ
What supplies should you have if the power goes out?
Keep water at 1 gallon, around 3.8 litres, per person per day for at least 3 days, alongside torches, a charged power bank, a battery or hand-crank radio, and a basic first aid kit. Non-perishable food that needs no cooking rounds out the core list.
Should I prepare for blackouts in the UK?
Yes, power cuts happen in the UK too, and official guidance recommends keeping a battery-powered or hand-crank radio on hand since phone networks can become unreliable during widespread outages. A basic kit with light, water, and charged devices applies regardless of where you live.
What food is good to have when you have no power?
Tinned goods, protein bars, peanut butter, and dried fruit are reliable choices because they need no cooking or refrigeration. Pack a manual can opener and disposable plates and utensils so you are not relying on electric appliances or a sink full of washing up.
What are the essentials to keep ready for a power cut?
The core essentials are water, light sources such as torches and lanterns, a charged power bank, a first aid kit, and a radio for updates. Add a pet kit, medication list, and warm blankets if those apply to your household.