How Long Does the Average Power Outage Last?

Quick answer: most individual power outages are short — often under two hours. But the average American household experienced nearly 11 hours without power in 2024, almost double the previous decade, because major storms and hurricanes cause long, multi-day outages that drag the average way up. In a typical year without major weather events, the figure is closer to 2 hours per customer. In short: most outages are brief, but the ones that matter — the multi-day disasters — are getting longer and more frequent.

Here’s what the data actually shows, why outages are lasting longer, and what it means for how you prepare.

The numbers: how long outages really last

The U.S. Energy Information Administration (EIA) tracks power reliability using a metric called SAIDI — the average total minutes (or hours) a customer is without power over a year. The recent picture:

2024: ~11 hours average per customer — the most in a decade, nearly double the prior ten-year norm.
Typical year (without major events): ~2 hours per customer — this baseline has stayed fairly steady.
Major events (hurricanes, storms) drove ~80% of 2024’s outage hours — the disasters, not everyday blips, are what balloon the average.

So there are really two kinds of outages: the common, short ones (a tripped line, a car hitting a pole — usually restored within a couple of hours) and the rare, catastrophic ones (a hurricane or ice storm knocking out power for days or weeks). The average blends both, but your preparation needs to account for the long tail.

Why 2024 was so bad

The spike wasn’t random. Hurricanes Beryl, Helene, and Milton accounted for roughly 80% of all the hours Americans spent without power in 2024. Hurricane Helene alone knocked out power for 5.9 million customers across 10 states, and hard-hit South Carolina averaged nearly 53 hours of interruption. When a single storm can leave millions in the dark for days, it dominates the national statistics — and it shows why “the average outage is short” is cold comfort if you’re in the path of the next big storm.

Why power outages are lasting longer

Several trends are pushing outage durations up:

More extreme weather. Stronger, wetter, more frequent storms and hurricanes cause more widespread, longer-lasting damage to the grid.

Aging infrastructure. Much of the U.S. grid is decades old, making it more vulnerable to failures and slower to repair.

Wildfire shutoffs. In fire-prone areas, utilities now proactively cut power (PSPS events) that can last days — see California PSPS: How to Prepare for Planned Power Shutoffs.

Increased demand. A grid under more strain from heat waves and rising electricity use is more prone to failures.

How long outages last by cause

Different causes mean very different durations:

Equipment failure or a car-vs-pole accident: usually 1–3 hours — localized and quickly fixed.
Thunderstorms and high winds: a few hours to a day, depending on damage.
Ice storms: often multiple days, as ice-laden lines and trees cause widespread damage.
Hurricanes: days to weeks in severely affected areas.
Planned wildfire shutoffs (PSPS): hours to several days, until conditions clear.

What this means for how you prepare

The data carries a clear lesson: prepare for both. For the common short outage, basic supplies and a portable power station cover you easily. But the outages that actually threaten your food, comfort, and safety are the multi-day ones — and those are becoming more common. That’s why backup power that can last days, not just hours, is increasingly worth it:

A portable power station handles the frequent short outages effortlessly.
Adding solar (a solar generator) or choosing a generator or home battery covers the multi-day events.

If you live in a hurricane, ice-storm, or wildfire region, plan for at least three days, and ideally a week, of self-sufficiency. See How to Prepare Your Home for a Power Outage and How to Power a House During a Blackout to build your plan.

Which states and regions have the longest outages?

Outage duration varies enormously by location. States in the hurricane belt — the Gulf Coast and Southeast (Louisiana, Florida, the Carolinas) — tend to see the longest average outages, driven by tropical storms; in 2024, South Carolina averaged nearly 53 hours largely due to Hurricane Helene. Ice-storm regions (parts of the Northeast, Appalachia, and the Plains) also see long outages when winter storms bring down lines. Wildfire states like California add planned shutoffs to the mix. Meanwhile, areas with newer infrastructure and milder weather see much shorter average outages, often close to the ~2-hour baseline.

The takeaway: your local risk matters more than the national average. If you live somewhere prone to hurricanes, ice storms, or wildfires, plan for multi-day outages regardless of what the countrywide number says.

Important safety notes

Averages hide huge variation: a brief flicker and a multi-day storm outage are both outages, and your local grid, weather and how rural you are matter more than any national figure. The numbers here come from public reporting and are not a prediction for your area. Plan for longer than average, especially where severe weather is common.

This guide is general information, not professional, legal or medical advice. During an outage, follow guidance from your utility and local authorities, keep fuel-burning generators outdoors and away from windows, and seek professional help for medical power needs.

Frequently asked questions

How long does the average power outage last? Most individual outages last under two hours, but the average U.S. customer experienced about 11 hours of total interruption in 2024 (versus ~2 hours in a normal year without major storms). Major weather events cause the long, multi-day outages that raise the average.

Why did power outages get longer in 2024? Hurricanes Beryl, Helene, and Milton drove about 80% of the nation’s 2024 outage hours. Hurricane Helene alone affected 5.9 million customers, with some areas out for days. Major storms, not everyday failures, are what make averages spike.

How long do hurricane power outages last? Days to weeks in severely affected areas. Hurricanes cause the longest, most widespread outages of any event, which is why hurricane-zone homes should prepare for extended, multi-day power loss.

Are power outages getting more frequent and longer? Yes. More extreme weather, aging grid infrastructure, wildfire shutoffs, and rising demand are all pushing outage durations up. The 2024 average was the highest in a decade.

How long should I prepare to be without power? At least three days covers most situations, but in hurricane, ice-storm, or wildfire regions, plan for up to a week. Multi-day outages are becoming more common, so backup power that lasts days is increasingly valuable.

The bottom line

Most power outages are short — under two hours — but that reassuring average hides the real risk: the multi-day disasters that are becoming more frequent and severe. In 2024, the U.S. average jumped to nearly 11 hours as hurricanes battered the grid, and the trend is upward thanks to extreme weather, aging infrastructure, and wildfire shutoffs. The smart takeaway is to prepare for both — easy supplies and a power station for the common blips, plus backup power that can last days for the storms that matter. Because when the big one hits, “the average outage is short” won’t keep your fridge cold or your devices charged.