Power outage history
Union County Ohio
1.8hours
without power for the average customer in a typical year, 2018–2025
84th most of 88 in Ohio 72% below 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 Union's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2022 was the worst well-recorded year, at 2.1 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Union, 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 |
|---|---|---|---|---|---|---|
| Mar 14, 2024 | Tornadoes | 3,539 | 12% | 9.8 h | 4.8 h | 16k |
| Jul 7, 2021 | No storm report | 3,095 | 10% | 6.2 h | 8.8 h | 11k |
| Aug 14, 2020 | Thunderstorms | 3,756 | 12% | 6.0 h | 2.5 h | 10.0k |
| Apr 29, 2021 | No storm report | 4,631 | 15% | 5.0 h | 5.2 h | 8.6k |
| Jul 5, 2023 | No storm report | 1,840 | 6% | 6.8 h | 2.5 h | 8.4k |
| Jun 13, 2022 | Thunderstorms | 3,507 | 12% | 4.5 h | 2.0 h | 8.2k |
| Jul 2, 2019 | Thunderstorms | 3,528 | 12% | 5.0 h | 4.2 h | 7.6k |
| Aug 21, 2022 | No storm report | 2,304 | 8% | 4.0 h | 3.0 h | 7.3k |
| Mar 18, 2021 | No storm report | 4,820 | 16% | 1.8 h | 1.0 h | 6.7k |
| Jun 10, 2020 | Thunderstorms | 538 | 2% | 15 h | – | 5.5k |
| Nov 13, 2023 | No storm report | 2,193 | 7% | 3.8 h | 5.2 h | 5.2k |
| Mar 17, 2023 | No storm report | 1,314 | 4% | 5.0 h | – | 5.1k |
| Jul 6, 2022 | Flooding | 1,340 | 4% | 8.8 h | – | 5.0k |
| Jun 15, 2018 | No storm report | 5,938 | 20% | 1.0 h | 30 min | 4.9k |
| Oct 27, 2019 | No storm report | 1,302 | 4% | 4.8 h | – | 4.7k |
| Oct 27, 2018 | No storm report | 720 | 2% | 6.2 h | – | 4.1k |
| Feb 24, 2024 | No storm report | 2,353 | 8% | 2.2 h | 2.0 h | 3.7k |
| Jun 18, 2019 | Flooding | 879 | 3% | 5.8 h | – | 3.7k |
| Aug 12, 2021 | No storm report | 1,329 | 4% | 2.5 h | – | 3.3k |
| Apr 9, 2021 | Thunderstorms | 1,322 | 4% | 2.5 h | – | 3.3k |
| Aug 12, 2025 | No storm report | 1,300 | 4% | 2.5 h | – | 3.2k |
| Aug 31, 2024 | No storm report | 950 | 3% | 3.5 h | – | 3.2k |
| Nov 6, 2024 | No storm report | 1,509 | 5% | 2.0 h | – | 3.0k |
| Mar 14, 2015 | No storm report | 1,718 | 6% | 2.5 h | 2.5 h | 3.0k |
| Sep 6, 2023 | No storm report | 1,469 | 5% | 2.0 h | – | 2.9k |
| Apr 17, 2025 | No storm report | 1,945 | 6% | 1.5 h | 1.5 h | 2.9k |
| Sep 2, 2016 | No storm report | 1,813 | 6% | 2.8 h | 2.2 h | 2.9k |
| Sep 10, 2016 | Thunderstorms | 852 | 3% | 3.2 h | – | 2.8k |
| Jul 22, 2017 | No storm report | 848 | 3% | 3.2 h | – | 2.7k |
| Apr 29, 2024 | No storm report | 966 | 3% | 3.0 h | – | 2.7k |
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 Union from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 76%
- Thunderstorms 15%
- Tornadoes 5.6%
- Flooding 3.0%
- Windstorm 0.6%
Who keeps the lights on
Utilities serving Union
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 |
| Dayton Power & Light Co | Investor Owned | 168 | 97 | 0.99 | 16.1 | 469k |
| Mid-Ohio Energy Coop, Inc | OH | 71 | 71 | – | 13.3 | 112k |
| Consolidated Cooperative | Cooperative | 162 | 109 | 1.99 | 17.0 | 17k |
| Pioneer Rural Elec Coop, Inc | Cooperative | 129 | 129 | 1.50 | 16.4 | 16k |
| Union Rural Electric Coop, Inc | Cooperative | 184 | 62 | 2.12 | 16.8 | 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.
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 30,359 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 →