How long does food last in the fridge and freezer without power?

About four hours in a refrigerator and about 48 hours in a full freezer, with the doors kept shut, according to Ready.gov. A half-full freezer holds about 24. The number that changes the answer is how often the door is opened, which is why the practical advice is to decide what you need before you open it.

The blackout kit you already own: what is in 123 million American homes

Q: How much water is in a home water heater?

It depends on the tank, and the federal survey reports it in bands rather than exact gallons: of 123.53 million American homes, 13.28 million have a tank of 30 gallons or less, 55.37 million have 31 to 49 gallons, 46.85 million have 50 gallons or more, and 8.03 million are tankless. That means 93 per cent of homes have a tank, and the most common band already holds more than the federal three-day figure for a family of four, which is 12 gallons.

Q: Can I drink the water from my water heater?

It is one of the water sources Ready.gov names for an emergency, with conditions. Turn off the electricity or the gas first and let it cool. Draw from the drain valve at the bottom, expect sediment in the first of it, and treat it before drinking as you would any stored water. Do not turn the heater back on until the supply is restored and the tank has refilled.

Q: Can I use my gas stove when the power is out?

Many gas cooktops will light with a match when the electric ignition has no power, and about 36 per cent of American homes have a gas, propane or dual-fuel range. The oven usually will not, because its controls are electric. What you must never do is use either one to heat the house: Ready.gov is explicit that this raises the risk of carbon monoxide poisoning and of fire.

the inventory

Tick what is in your house, and see what it already covers

Nothing here asks you to buy anything. Pick your state so the outage length is yours rather than a national average, say how many people are in the house, and tick what you actually have. The water arithmetic uses the bottom of each published tank band, never a midpoint, because the survey publishes bands and inventing an average inside one would be making up a number.

Your state Sets the outage length from the same federal table used in part v of this chapter.

People in the house The federal baseline is one gallon per person per day for drinking and basic sanitation.

Your water heater 93 per cent of American homes have a tank. The label on the side gives the size; if you cannot see it, pick the middle band, which is the most common.

Bottled or stored water, in gallons Jugs, cases of bottles, jerricans. Count only what is sealed or properly stored, not the kettle.

And which of these are in the house

A gas or propane cooktop An outdoor grill with fuel in it A separate freezer, mostly full A car with fuel in the tank A torch or headlamp with working batteries A charged power bank

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gallons already in the house

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days of water, for your household

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hours your state averaged in 2024

Water you already have

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What your state's average outage needs

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What a three-day plan needs

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Sources: EIA Residential Energy Consumption Survey 2020, housing characteristics tables (final release March 2023), for what is in American homes; EIA Electric Power Annual Table 11.2, data for 2024, released 16 October 2025, for the outage hours, which are the same figures as part v of this chapter; Ready.gov for one gallon per person per day, for the four-hour refrigerator and 48-hour full freezer, and for the rule that a generator runs outdoors only. All read 11 September 2026. The tank figure counts the bottom of your band, so the real number is that or more. A water heater is a water source only after the power or gas is off and the tank has cooled, and what comes out still needs treating.

what is actually in american homes

Not a guess, a survey of 123.5 million households

Preparedness writing is full of assumptions about what a normal house contains. The federal residential energy survey counted it. Every figure below is out of 123.53 million homes.

Already in the house	Homes	Share
A water heater with a tank	115.5 M	93.5%
A tank of 50 gallons or more	46.9 M	37.9%
An outdoor grill	69.5 M	56.3%
A propane grill	42.1 M	34.1%
A gas, propane or dual-fuel range	44.8 M	36.2%
A separate freezer	41.1 M	33.3%
A charcoal grill	22.7 M	18.4%

Source: U.S. Energy Information Administration, Residential Energy Consumption Survey 2020, housing characteristics tables HC 3.1 (appliances) and HC 8.1 (water heating), final release March 2023, read 11 Sept 2026. Shares are our division of the published counts by the published total of 123.53 million homes. The tank figure is the sum of the three size bands, which excludes the 8.03 million tankless homes.

the tank nobody counts

Forty gallons, in a cupboard, that you paid for years ago

A family of four following the federal three-day guidance needs twelve gallons. The most common water heater band in the survey is 31 to 49 gallons, and the next most common is 50 or more. The water is already in the house, already paid for, and refreshed every time somebody showers.

The conditions are real and short. Turn off the electricity at the breaker or the gas at the valve first, and let the tank cool. Draw from the drain valve at the bottom, and expect the first of it to carry sediment. Treat what comes out before drinking it, exactly as part viii sets out. Do not switch the heater back on until the supply is back and the tank has refilled, because an element firing in an empty tank destroys itself.

What this does not replace. It is one tank, once. It does not rotate, it is not portable, and if the outage came with a boil-water notice, the water inside was drawn before the notice and still needs treating. It buys days, not a plan. What a plan looks like is the storage guide, and how much you actually need is the household water plan.

Fill the bathtub before a forecast storm, not after the water goes off. That one is free, and it is the step people remember an hour too late.

the two rules that do not bend

Cooking is not heating, and outdoors means outdoors

About 36 per cent of American homes have a gas, propane or dual-fuel range, and many of those cooktops will light with a match when the electric ignition has no power. That is a genuine capability sitting in the kitchen. The oven usually will not, because its controls are electric.

Never heat the house with a gas stove or oven. Ready.gov is explicit: it raises the risk of carbon monoxide poisoning and of fire. Cooking briefly with ventilation is not the same act as running a burner for warmth, and the second one kills people every winter.

A grill is an outdoor appliance, and so is a generator. Fifty-six per cent of homes have a grill, which solves cooking during an outage as long as it stays outside. The same rule runs harder for generators: Ready.gov puts them outdoors and at least twenty feet from windows, doors and an attached garage. Neither one is negotiable because of weather. Part v works out whether a generator is even the right answer for your state's outage pattern.

the actual procedure

Getting the water out of the tank

The claim on this page is that there is a tank of water in your house. This is a plumber showing what draining one actually involves, which is the part that decides whether the idea is useful to you or theoretical. It is his work, shown here with his embed enabled.

Video by a creator we don't own

"How to Drain An Electric Water Heater" by TAPP PLUMBING on YouTube. His procedure and his equipment, not ours. He is draining a tank for maintenance; in an outage the power goes off first and the water still needs treating before anyone drinks it.

closing the chapter

Nine parts, and the order they were in

This chapter started with a number: how many gallons a household needs. It ends with a different one: how many are already in the building. Everything between the two was an attempt to answer a question with a public figure and a date rather than with a product.

What the nine parts add up to is an order of operations. Count what you have. Know what your roof, your climate and your grid actually give you. Treat what you collect. Buy last, and only where the arithmetic says the gap is real. Four of the pages on this site carry an affiliate link and say so at the top; the eight calculators and every guide carry none, and that is the whole arrangement.

chapter 03 · water at homenine parts, read in any order

i.How much water your house needs, and the Water Freedom System review
ii.Rain barrel calculator, by state
iii.48 hours without power: a small apartment's quiet plan
iv.A 30-day pantry, priced with this month's numbers
v.Generator vs. battery: what your state's outages say
vi.Water from air, explained by the humidity where you live
vii.This week's drought map, and your plan on top of it
viii.Filter, treat, test: making stored water drinkable
ix.The blackout kit you already own

That is the whole chapter. The next one starts in the journal.See what is next →

straight answers

Questions people ask

How much water is in a home water heater?

The federal survey reports bands, not exact gallons: of 123.53 million homes, 13.28 million have 30 gallons or less, 55.37 million have 31 to 49, 46.85 million have 50 or more, and 8.03 million are tankless. So 93 per cent have a tank, and the commonest band alone beats the federal three-day figure for a family of four, which is twelve gallons.

Can I drink the water from my water heater?

Ready.gov names it as an emergency water source, with conditions. Power or gas off first, let it cool, draw from the bottom valve, expect sediment at the start, and treat it before drinking. Do not switch the heater on again until the supply is back and the tank has refilled.

Can I use my gas stove when the power is out?

The cooktop often lights with a match; the oven usually will not, because its controls are electric. About 36 per cent of homes have a gas, propane or dual-fuel range. What you must never do is heat the house with either: Ready.gov names carbon monoxide poisoning and fire.

How long does food last without power?

About four hours in the refrigerator and about 48 in a full freezer with the doors shut, per Ready.gov; roughly 24 in a half-full freezer. A third of American homes have a separate freezer, which is a second cold box most people forget they own.

So what should I actually buy?

Whatever the tool above says is missing, and nothing else. For most households the gap is not a machine; it is a torch with live batteries, a way to treat water, and having filled the tub before the storm rather than after. This page sells nothing and recommends nothing.

Last updated: 11 September 2026. Household figures are the EIA's 2020 survey, released March 2023; outage hours are the EIA's 2024 data; safety rules are Ready.gov's. All with the dates shown. This is general guidance, not engineering or safety advice for your building.

How we stay honest: the household counts are the EIA's 2020 residential energy survey with its release date, and the only arithmetic of ours is turning its counts into shares of the published total. The tank arithmetic uses the bottom of your published band, never an invented midpoint, so the real figure is that or more. Outage hours are the same federal table as part v of this chapter, so the site does not carry two answers to one question. The safety rules about gas appliances and generators are Ready.gov's and are not ours to soften. We recommend no product on this page. The video belongs to the creator credited above.