Power outage history
Cuyahoga County Ohio
8.0hours
without power for the average customer in a typical year, 2018–2025
19th most of 88 in Ohio 1.2× the national median
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 Cuyahoga's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2024 was the worst well-recorded year, at 29 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Cuyahoga, hours without power per customer
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 |
|---|---|---|---|---|---|---|
| Aug 6, 2024 | Thunderstorms | 223,470 | 37% | 5.3 d | 4.7 d | 16M |
| Aug 25, 2023 | Tornadoes | 70,828 | 12% | 2.9 d | 2.8 d | 2.0M |
| Aug 11, 2021 | Thunderstorms | 68,713 | 11% | 2.1 d | 46 h | 1.4M |
| Nov 15, 2020 | Thunderstorms | 54,942 | 9% | 40 h | 38 h | 1.0M |
| Sep 13, 2019 | Thunderstorms | 41,555 | 7% | 47 h | 2.4 d | 919k |
| Dec 1, 2020 | Winter storm | 49,804 | 8% | 41 h | 26 h | 804k |
| Mar 8, 2017 | No storm report | 59,429 | 10% | 33 h | 28 h | 790k |
| Mar 1, 2018 | Winter storm | 38,761 | 6% | 32 h | 35 h | 732k |
| Feb 24, 2019 | Windstorm | 30,041 | 5% | 34 h | 38 h | 530k |
| Mar 25, 2023 | Thunderstorms | 32,431 | 5% | 28 h | 31 h | 527k |
| Aug 9, 2016 | Thunderstorms | 26,895 | 4% | 25 h | 33 h | 410k |
| Jul 20, 2023 | Thunderstorms | 33,406 | 6% | 22 h | 25 h | 391k |
| Nov 5, 2017 | Thunderstorms | 20,583 | 3% | 21 h | 33 h | 242k |
| Aug 11, 2016 | Thunderstorms | 48,830 | 8% | 14 h | 26 h | 235k |
| Oct 20, 2018 | Thunderstorms | 17,637 | 3% | 18 h | 29 h | 195k |
| Jun 18, 2025 | Thunderstorms | 23,300 | 4% | 19 h | 27 h | 194k |
| May 28, 2021 | No storm report | 21,837 | 4% | 19 h | 31 h | 189k |
| Jun 10, 2020 | Thunderstorms | 17,423 | 3% | 16 h | 21 h | 185k |
| Jan 10, 2017 | Windstorm | 15,195 | 3% | 11 h | 13 h | 105k |
| Jun 27, 2025 | Thunderstorms | 12,635 | 2% | 13 h | 24 h | 102k |
| Apr 21, 2021 | Winter storm | 13,786 | 2% | 8.5 h | 6.8 h | 87k |
| Nov 1, 2020 | No storm report | 26,915 | 4% | 9.5 h | 7.0 h | 86k |
| Mar 26, 2021 | Windstorm | 15,824 | 3% | 7.2 h | 13 h | 78k |
| Dec 11, 2021 | Windstorm | 19,168 | 3% | 7.0 h | 7.5 h | 75k |
| Apr 12, 2024 | Windstorm | 11,286 | 2% | 9.0 h | 18 h | 75k |
| Jun 23, 2025 | No storm report | 21,935 | 4% | 6.8 h | 6.0 h | 74k |
| Mar 1, 2017 | Thunderstorms | 10,924 | 2% | 8.8 h | 17 h | 72k |
| Jul 24, 2025 | No storm report | 10,476 | 2% | 9.0 h | 13 h | 70k |
| Dec 30, 2019 | Windstorm | 13,447 | 2% | 7.0 h | 10 h | 69k |
| Nov 27, 2019 | Windstorm | 13,851 | 2% | 6.2 h | 15 h | 66k |
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 Cuyahoga from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Thunderstorms 78%
- Tornadoes 7.5%
- Winter storm 6.3%
- No storm on record 5.0%
- Windstorm 3.6%
Who keeps the lights on
Utilities serving Cuyahoga
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 |
|---|---|---|---|---|---|---|
| Ohio Edison Co | Investor Owned | 244 | 131 | 1.51 | 16.0 | 961k |
| Cleveland Electric Illum Co | Investor Owned | 196 | 136 | 1.37 | 16.2 | 678k |
| City of Cleveland | Municipal | 225 | 191 | 0.69 | 16.4 | 65k |
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.
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 602,248 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 →