ArchipelAI
PREPAREDNESS

Power outage preparedness.

Outages are getting longer. A week without power is now a plausible scenario in half the country. Here's how to plan for it.

Why this matters more than it used to

US customer-hours of interruption have roughly doubled over the last decade, and the entire increase is major weather events. Hurricanes, ice storms, wildfires, and heat-driven grid strain now regularly produce outages measured in days, not hours. In fire-prone parts of California, Public Safety Power Shutoffs (PSPS) intentionally cut power to millions of customers during Red Flag conditions.

Food and water

  • One gallon of water per person per day, for a week. Half for drinking, half for hygiene and cooking.
  • Non-perishable food that doesn't need cooking. Peanut butter, tuna pouches, crackers, dried fruit, nut bars. A manual can opener.
  • Keep the fridge closed. Safe for about 4 hours. After that, transfer perishables to a cooler on ice.
  • Freezer strategy. A full freezer holds ~48 hours if the door stays closed. Fill empty freezer space with jugs of water so it holds longer and gives you drinking water later.
  • When in doubt, throw it out. Any food above 40°F for more than 2 hours is a gamble.

Light and power

  • Battery-powered LED lanterns and headlamps in every bedroom. Candles cause house fires every year during outages — don't.
  • USB power banks totaling at least 40,000 mAh for the household. Recharge quarterly.
  • A NOAA weather radio, hand-crank or battery.
  • Car USB adapters — a modern car becomes a decent phone-charging station if you can idle it briefly in a well-ventilated area.

Medical continuity

If anyone in the household depends on electricity for medical reasons — CPAP, home oxygen concentrator, dialysis, refrigerated insulin, powered mobility — you need a plan that survives 72 hours minimum:

  • Register with the utility's medical baseline program. Some utilities give priority restoration; all give advance PSPS notice.
  • Buy or rent a battery backup rated for at least 24 hours of your specific device. CPAP-specific batteries exist.
  • Identify a fallback destination — a family member's house on a different circuit, a hotel with generator, or a hospital.
  • Keep 7 days of insulin and refrigerated meds; the pharmacy can advise on how long each survives at room temperature.

Generators — done right

Portable generators kill people every outage, almost always by carbon monoxide. Rules that are not optional:

  • Outdoors only. Never inside, never in a garage — open or closed. At least 20 feet from any window, door, or vent.
  • CO detectors in every sleeping area. Battery-powered, with fresh batteries.
  • No backfeeding. Plugging a generator into a wall outlet electrifies the neighborhood and can kill utility workers. Use a proper interlock kit or transfer switch installed by an electrician.
  • Store fuel safely. Gasoline outdoors in an approved container. Stabilizer if it will sit more than a month.

For most households a 3,000-5,000 W inverter generator (quiet, cleaner power for electronics) covers the fridge, a few lights, phone charging, and a window AC or space heater. Whole-home standby generators make sense mostly for medical dependencies or long-outage regions.

Heat and cold

Loss of power in extreme weather is the outage that kills. Two rules:

  • Heat. Move to the coolest room, close blinds, and drink water. If indoor temperature climbs above 90°F for more than a few hours, relocate to a cooling center or a friend's house on a different circuit. Never use a gas oven for heat.
  • Cold. Consolidate into one room, seal it with blankets over doorways, wear layers. Do not use a gas oven, charcoal grill, or camp stove indoors for heat — CO risk. Battery-powered space heaters exist but are limited; the safer plan is a warm shelter.

Communications and information

  • Charge every device to full when a storm is forecast.
  • Send a status text to your out-of-area contact at the start of the outage so they know you're out — cell networks may drop later.
  • Keep a printed list of important numbers; when your phone dies, you'll wish you had it.
// frequently asked

Common questions

How long do modern power outages last?
US average is trending up — from 3.5 hours per customer per year in 2013 to 8 hours in 2023, dominated by weather events. A single major storm can produce multi-day outages for millions of customers.
How long is food safe in a full fridge and freezer without power?
A closed fridge holds safe temperatures for about 4 hours. A full freezer holds for about 48 hours; a half-full freezer, about 24. Keep the doors closed.
Are portable generators safe indoors?
No. Portable gas generators produce carbon monoxide at levels that can be lethal in minutes. Never run one indoors, in a garage, or within 20 feet of any window, door, or vent.
What is a PSPS?
Public Safety Power Shutoff — an intentional outage by California utilities during Red Flag conditions to prevent lines from starting fires. They can last several days. Sign up for utility alerts if you're in an affected area.
Do I need a whole-home generator?
For most households, no — a properly-sized inverter or portable generator plus a transfer switch or interlock is much cheaper and covers the essentials. Whole-home standby generators make sense for medical dependencies or long-outage regions.
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