Multi-Day Outage: Planning for 3 to 14 Days Without Power and Water
A multi-day power and water outage demands different preparation than a 24-hour blackout. How to calculate supplies and organise daily life when infrastructure fails.
Day Three Without Power — When Crisis Thinking Sets In
The first 24 hours of a crisis typically pass in a kind of stunned waiting. Many people simply expect the problem to resolve itself. After 48 hours, a different reality sets in: this is not a normal brief blackout. The supermarket has barely any stock left, the hospital is operating on emergency protocols, and your phone shows 10 percent battery.
Day three marks the real challenge. Not survival in the sense of warmth and drinking water, but organising ordinary life under extraordinary circumstances. What do you eat across multiple days? How do you maintain personal hygiene? How do you stay informed? How do you protect the mental health of children in the household?
This guide helps you answer these questions in advance.
Supply Calculation for 3 to 14 Days
The most common misconception: "I have enough food in the fridge." The average household without targeted preparation has supplies for 1.5 to 3 days. A genuine multi-day outage requires significantly more.
Calories Per Person Per Day
A resting adult needs approximately 2,000 kilocalories daily. Children aged 6–12: 1,600 kcal. Older adults: 1,800 kcal. With physical activity (chopping firewood, shovelling snow), the requirement rises to 2,500–3,000 kcal.
Daily Quantities for 7 Days (per person)
| Food | Quantity (7 days) | Calories/day |
|---|---|---|
| Oats (breakfast) | 700 g | ~250 kcal |
| Rice (main dish) | 1,400 g | ~350 kcal |
| Lentils or beans (canned) | 7 × 400 g | ~300 kcal |
| Nuts and dried fruit | 700 g | ~450 kcal |
| Crispbread or rusk | 700 g | ~250 kcal |
| Canned goods (tuna, tomatoes, etc.) | 10 cans | ~200 kcal |
| Oil, salt, spices | 100 g each | ~100 kcal |
| Total | ~1,900 kcal/day |
For 14 days, double these quantities. For a family of two adults and two children, multiply by a factor of 3–4 (children require slightly less).
Drinking Water
The standard recommendation is two litres per person per day for drinking. Realistically you need an additional one to two litres for cooking and basic hygiene. Total requirement: four litres per person per day.
For a family of four over 14 days: 224 litres.
This sounds like a lot, but 10-litre containers are easy to store. Alternatively, bathtub liner inserts (such as WaterBOB products) can use a bathtub as a 300-litre reservoir when you have advance warning.
Daily Structure Without Infrastructure
Without electricity, not only light and heating disappear — the entire daily routine does too. No television, no internet, no work schedule. Those who do not build their own daily structure quickly experience exhaustion, boredom, and conflict.
Fixed Times Create Stability
Establish fixed times for meals, activities, and sleep. For families with children this is especially important — children often respond to crisis situations with anxiety or behavioural changes. A predictable daily schedule provides security.
A sample daily plan:
- 07:00: Breakfast, check the radio for situation updates
- 09:00: Distribute tasks for the day (boiling water, fuel management, tidying)
- 12:00: Lunch with a brief rest
- 14:00: Activity with children (board games, card games, reading aloud)
- 17:00: Prepare dinner
- 19:00: Sunset checkpoint — prepare candles and lamps, check weather
- 21:00: Sleep (earlier than usual — makes sense with limited light)
Hygiene Without Running Water
Limit water consumption to what is necessary. Pre-moistened wipes (sealed packets or homemade) replace daily showering for weeks at a time. Dry shampoo handles hair care without water. For toilets: if flushing is not possible, manually refill the cistern with reserve water or use a camping toilet with biodegradable bags.
Energy Sources for Multi-Day Outages
Lighting
Head torches with AAA batteries (or rechargeable) are ideal — both hands remain free. Plan for ten hours of use per night. Candles supplement the atmosphere, but safety rules apply: never leave unattended, never near children without supervision.
Cooking
A camping stove with gas canisters used for two meals per day consumes approximately one 227-gram canister every four days at standard cooking times (15 minutes per meal). For 14 days you need at least four canisters, preferably six.
Efficiency rules: cook with a lid, use precisely measured water, prepare large quantities (cook once daily rather than three times).
Communication and Information
A battery-powered FM radio is essential. During a multi-day outage, authorities will communicate via radio: water supply status, evacuation recommendations, hospital capacity updates.
Charge your smartphone from a power bank (at least 20,000 mAh). A well-charged power bank covers 4–5 full charging cycles for a modern smartphone.
Mental Health in a Crisis
Multi-day crises are not purely supply challenges — they are psychological endurance tests. Uncertainty, limited information, and extended close proximity on a small space generate stress.
Strategies for Adults
Limit your information intake. Check radio updates once in the morning and once in the evening — not hourly. Compulsive information-seeking with no new developments available increases anxiety without providing any benefit.
Consciously maintain activities that have nothing to do with the crisis: reading books, playing card games, doing craftwork. This is not avoidance — it is active stress regulation.
Supporting Children
Explain the situation to children in an age-appropriate but honest way. Excessive minimisation breeds uncertainty when children observe something worrying themselves. "We have no power right now, and this will last a few days. We have everything we need" — clear, calm statements help.
Involve children in tasks: measuring water, lighting candles, helping prepare meals. Agency reduces anxiety.
Multi-Day Outage Preparedness Checklist
| Area | Measure | 3 Days | 7 Days | 14 Days |
|---|---|---|---|---|
| Water | Litres per person total | 12 L | 28 L | 56 L |
| Calories | kcal package per person | 6,000 | 14,000 | 28,000 |
| Cooking | Gas canisters (227 g) | 1 | 2 | 6 |
| Light | Battery / charge capacity | 2 nights | 5 nights | 10 nights |
| Information | Battery FM radio | Essential | Essential | Essential |
| Hygiene | Wipes (packets) | 1 | 3 | 6 |
| Medical | Medication supply (days) | 30 | 30 | 30 |
