Power outage history
Anderson County South Carolina
21hours
without power for the average customer in a typical year, 2018–2025
10th most of 46 in South Carolina 3.2× 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 Anderson'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 5.2 days for the average customer. Hatched years have a thin record and are left out of the averages.
Anderson, 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 |
|---|---|---|---|---|---|---|
| Sep 27, 2024 | Hurricane Helene | 101,520 | 100% | 10.6 d | 8.2 d | 12M |
| Sep 11, 2017 | Hurricane Irma | 27,678 | 27% | 3.1 d | 35 h | 863k |
| Feb 16, 2015 | Winter storm | 24,801 | 24% | 48 h | 24 h | 626k |
| May 9, 2024 | Thunderstorms | 25,580 | 25% | 46 h | 39 h | 533k |
| Apr 13, 2020 | Thunderstorms | 21,526 | 21% | 2.5 d | 2.5 d | 457k |
| Oct 29, 2020 | Hurricane Zeta | 17,529 | 17% | 2.2 d | 41 h | 343k |
| Dec 23, 2022 | Winter storm | 15,559 | 15% | 39 h | 9.2 h | 225k |
| Jun 7, 2025 | Thunderstorms | 15,348 | 15% | 22 h | 19 h | 164k |
| Jul 18, 2015 | Thunderstorms | 10,554 | 10% | 27 h | 24 h | 161k |
| Jul 21, 2018 | Thunderstorms | 10,733 | 11% | 20 h | 18 h | 107k |
| Jul 26, 2021 | No storm report | 14,053 | 14% | 12 h | 6.8 h | 103k |
| Jun 26, 2015 | Thunderstorms | 7,483 | 7% | 26 h | 23 h | 94k |
| Jun 1, 2018 | Thunderstorms | 8,042 | 8% | 25 h | 25 h | 92k |
| Jun 22, 2019 | Thunderstorms | 5,954 | 6% | 32 h | 33 h | 88k |
| Apr 6, 2017 | Thunderstorms | 6,992 | 7% | 20 h | 19 h | 66k |
| Apr 28, 2023 | No storm report | 17,578 | 17% | 8.5 h | 7.8 h | 65k |
| Jul 1, 2023 | Thunderstorms | 8,010 | 8% | 15 h | 14 h | 64k |
| Aug 17, 2024 | Thunderstorms | 4,363 | 4% | 16 h | – | 49k |
| Feb 14, 2015 | Windstorm | 4,802 | 5% | 17 h | – | 43k |
| Oct 4, 2015 | No storm report | 5,496 | 5% | 18 h | 15 h | 42k |
| Jun 30, 2015 | Thunderstorms | 7,396 | 7% | 10 h | 10 h | 41k |
| Feb 24, 2016 | Windstorm | 3,273 | 3% | 24 h | – | 36k |
| Jan 16, 2022 | Winter storm | 5,498 | 5% | 13 h | 7.8 h | 34k |
| Feb 28, 2024 | Thunderstorms | 3,392 | 3% | 11 h | – | 31k |
| Jun 25, 2018 | Thunderstorms | 3,175 | 3% | 15 h | – | 31k |
| Jan 10, 2025 | Winter storm | 4,005 | 4% | 14 h | – | 30k |
| Jun 12, 2023 | Thunderstorms | 3,487 | 3% | 9.5 h | – | 27k |
| Jun 28, 2020 | Thunderstorms | 4,344 | 4% | 8.8 h | – | 26k |
| Sep 27, 2018 | Thunderstorms | 5,159 | 5% | 7.8 h | 11 h | 25k |
| Jun 17, 2025 | Thunderstorms | 4,433 | 4% | 13 h | – | 25k |
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 Anderson from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Tropical storm 80%
- Thunderstorms 12%
- No storm on record 5.6%
- Winter storm 1.9%
Who keeps the lights on
Utilities serving Anderson
As each utility reports to the Energy Information Administration for its whole South Carolina 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 Carolinas, LLC | Investor Owned | 220 | 141 | 1.26 | 13.5 | 582k |
| Little River Electric Coop Inc | SC | – | – | – | 15.0 | 151k |
| Blue Ridge Electric Coop Inc | Cooperative | 205 | 160 | – | 19.8 | 69k |
| Laurens Electric Coop, Inc | Cooperative | 211 | 154 | 1.79 | 15.6 | 60k |
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
- Abbeville 26 h
- Greenville 25 h
- Laurens 22 h
- Oconee 22 h
- Anderson (this county) 21 h
- Pickens 15 h
- Elbert, GA 3.6 h
- Hart, GA 3.3 h
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 101,520 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 →