– 0% of Hamilton out 0 customers out in Ohio

Power outage history

Hamilton County Ohio

3.8hours

without power for the average customer in a typical year, 2018–2025

62nd most of 88 in Ohio 43% below the national median

Worst outage on record Hurricane Helene · Sep 27, 2024 16% of customers out · 90% back in 4.0 hours

Hours without power, average customer per year 3.8h / yr State average 5.5 h · national median 6.6 h

Major outages a year 0.6 Peaks over 10% of customers or 50,000 customers

Typical time to restore 90% 30hours Median across major outages, from the peak

Longest single outage 2.1days Hurricane Helene, over 1% of customers out

Outage hours on storm days 94% Share falling on days with a NOAA storm report here

Worst year 2022 6.5 hours without power, average customer

Electricity customers 437,530 ORNL customer model · 8 well-covered years

Every day since 2015

Eleven years, one night at a time

Each cell is a day. The brighter it is, the larger the share of Hamilton's customers who were without power at that day's worst moment.

20152016201720182019202020212022202320242025

0%100% of customers out

Year by year

Hours in the dark, per customer

2022 was the worst well-recorded year, at 6.5 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Hamilton, hours without power per customer

HamiltonUS median countyOhio average

The record

The biggest outages since 2015

Ranked by customer-hours lost: customers out multiplied by how long they stayed out. Times are local.

Began	Storm	Peak out	Share	Lasted	90% restored	Customer-hours
Sep 27, 2024	Hurricane Helene	70,272	16%	2.1 d	4.0 h	1.3M
Jun 13, 2022	Thunderstorms	57,698	13%	42 h	30 h	1.1M
Nov 15, 2018	Ice storm	66,555	15%	43 h	32 h	1.1M
Apr 8, 2020	Thunderstorms	45,694	10%	37 h	35 h	717k
Jul 6, 2022	Thunderstorms	57,136	13%	24 h	18 h	638k
Jul 7, 2017	Thunderstorms	24,723	6%	19 h	18 h	270k
Mar 3, 2023	Windstorm	20,268	5%	22 h	21 h	235k
Apr 2, 2016	No storm report	24,996	6%	15 h	17 h	196k
Jul 13, 2016	Thunderstorms	18,844	4%	15 h	15 h	144k
Jul 14, 2015	No storm report	23,170	5%	9.8 h	7.0 h	140k
Jun 18, 2025	Thunderstorms	19,277	4%	9.8 h	12 h	104k
May 31, 2018	Tropical Storm Alberto	24,194	6%	7.0 h	14 h	93k
Sep 5, 2018	Thunderstorms	19,588	4%	7.2 h	6.0 h	78k
Oct 20, 2018	No storm report	12,503	3%	8.2 h	15 h	77k
Apr 3, 2025	Thunderstorms	12,974	3%	9.5 h	19 h	75k
Sep 4, 2015	Thunderstorms	13,013	3%	9.2 h	21 h	75k
Dec 30, 2019	Windstorm	14,726	3%	4.0 h	1.2 h	55k
Feb 5, 2025	Winter storm	8,486	2%	7.2 h	1.2 h	52k
Aug 20, 2019	Thunderstorms	12,520	3%	5.5 h	6.8 h	47k
Jun 18, 2021	Thunderstorms	11,618	3%	5.0 h	17 h	46k
Jun 15, 2016	Thunderstorms	8,760	2%	6.0 h	16 h	42k
Mar 14, 2019	Thunderstorms	8,373	2%	7.0 h	6.0 h	41k
Nov 15, 2020	Windstorm	9,742	2%	4.8 h	7.0 h	37k
Mar 15, 2024	Thunderstorms	8,299	2%	5.0 h	4.5 h	32k
Mar 1, 2017	Flooding	10,298	2%	4.2 h	17 h	31k
Dec 15, 2016	No storm report	13,453	3%	4.2 h	3.8 h	31k
Jul 27, 2020	Thunderstorms	15,524	4%	3.0 h	4.2 h	30k
Oct 13, 2017	No storm report	7,794	2%	3.8 h	2.5 h	29k
Sep 8, 2018	Flooding	7,132	2%	8.2 h	7.2 h	29k
Jul 14, 2015	No storm report	7,342	2%	4.2 h	16 h	27k

After the peak

How fast the lights come back

Each line is one major outage, from its peak. The amber line is the typical path.

When it happens

The outage clock

Customer-hours out by month (rings, January innermost) and local hour, 2018–2025.

What was happening

Weather behind the outages

Each outage is matched to NOAA storm reports for Hamilton from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.

Thunderstorms 47%
Tropical storm 21%
Ice storm 17%
Windstorm 6.1%
No storm on record 6.0%
Flooding 1.2%
Winter storm 0.9%

Who keeps the lights on

Utilities serving Hamilton

As each utility reports to the Energy Information Administration for its whole Ohio territory, not this county alone. Outage minutes include major storm days.

Utility	Type	Outage min / yr	Excl. major storms	Outages / yr	Residential ¢/kWh	Customers
Duke Energy Ohio Inc	Investor Owned	178	108	1.01	16.8	700k
Butler Rural Electric Coop Inc	Cooperative	172	103	1.59	18.4	12k

EIA Form 861, latest year each utility reported. Outage minutes are SAIDI, the yearly minutes the average customer goes without power; outages a year are SAIFI.

Next door

Neighbouring counties

Clermont 6.9 h
Franklin, IN 5.0 h
Dearborn, IN 4.3 h
Campbell, KY 4.1 h
Hamilton (this county) 3.8 h
Butler 3.5 h
Warren 3.4 h
Kenton, KY 3.2 h
Boone, KY 2.3 h

Across Ohio

Where it is darkest

Hours / yr64+

All Ohio counties →

About these numbers

Notes

Outages come from the EAGLE-I record of utility outage maps collected every 15 minutes by Oak Ridge National Laboratory. Hours without power are customer-hours divided by the county's 437,530 electricity customers. Averages use well-covered years from 2018. Outages shorter than 15 minutes, and utilities that publish no outage map, are not in the record, so these figures understate the total. How every number is made →