Power outage history
Transylvania County North Carolina
26hours
without power for the average customer in a typical year, 2018–2025
9th most of 100 in North Carolina 4.0× 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 Transylvania'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 5.6 days for the average customer. Hatched years have a thin record and are left out of the averages.
Transylvania, 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 | 21,167 | 78% | 13.7 d | 10.2 d | 3.4M |
| Dec 8, 2018 | Winter storm | 10,779 | 40% | 4.0 d | 2.8 d | 379k |
| Apr 13, 2020 | Flooding | 10,446 | 38% | 2.8 d | 2.2 d | 303k |
| Mar 16, 2025 | Windstorm | 12,015 | 44% | 38 h | 27 h | 168k |
| Oct 29, 2020 | Hurricane Zeta | 7,154 | 26% | 2.5 d | 47 h | 120k |
| Dec 8, 2017 | Winter storm | 2,703 | 10% | 44 h | 25 h | 60k |
| Jan 13, 2019 | Ice storm | 4,015 | 15% | 37 h | 26 h | 56k |
| Feb 14, 2015 | No storm report | 4,792 | 18% | 23 h | 12 h | 51k |
| Apr 1, 2023 | No storm report | 4,129 | 15% | 26 h | 19 h | 41k |
| Dec 7, 2024 | No storm report | 6,392 | 23% | 6.5 h | 3.5 h | 39k |
| Jan 11, 2020 | Flooding | 2,316 | 9% | 25 h | 23 h | 35k |
| Mar 24, 2024 | No storm report | 3,963 | 15% | 8.8 h | 7.8 h | 30k |
| Oct 23, 2017 | Flooding | 1,669 | 6% | 29 h | 29 h | 28k |
| Apr 11, 2024 | No storm report | 3,711 | 14% | 7.2 h | 5.8 h | 26k |
| Apr 14, 2019 | No storm report | 5,119 | 19% | 23 h | 8.0 h | 26k |
| Dec 10, 2023 | No storm report | 3,564 | 13% | 7.2 h | 48 min | 23k |
| Mar 31, 2022 | No storm report | 3,070 | 11% | 12 h | 8.8 h | 23k |
| May 27, 2018 | No storm report | 2,385 | 9% | 12 h | 10 h | 21k |
| Dec 24, 2022 | Winter storm | 2,761 | 10% | 8.8 h | 6.2 h | 20k |
| Sep 16, 2018 | Hurricane Florence | 3,226 | 12% | 5.2 h | 4.5 h | 17k |
| Oct 10, 2015 | No storm report | 3,167 | 12% | 5.2 h | 5.0 h | 17k |
| Aug 17, 2021 | Tropical Storm Fred | 2,084 | 8% | 20 h | 17 h | 15k |
| Feb 6, 2024 | No storm report | 3,304 | 12% | 6.5 h | 3.5 h | 15k |
| Oct 8, 2017 | Hurricane Nate | 1,245 | 5% | 23 h | – | 13k |
| Nov 25, 2024 | No storm report | 3,305 | 12% | 6.8 h | 6.2 h | 13k |
| Nov 24, 2018 | Winter storm | 753 | 3% | 18 h | – | 13k |
| Feb 7, 2021 | Winter storm | 2,039 | 7% | 11 h | 8.2 h | 12k |
| Jul 31, 2022 | No storm report | 3,226 | 12% | 4.5 h | 4.5 h | 12k |
| Jun 28, 2015 | No storm report | 2,945 | 11% | 3.8 h | 3.8 h | 11k |
| Apr 16, 2024 | No storm report | 3,575 | 13% | 3.0 h | 1.2 h | 11k |
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 Transylvania from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Tropical storm 67%
- No storm on record 13%
- Winter storm 8.1%
- Flooding 6.6%
- Windstorm 3.3%
- Ice storm 1.0%
- Thunderstorms 0.7%
Who keeps the lights on
Utilities serving Transylvania
As each utility reports to the Energy Information Administration for its whole North 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 | 216 | 172 | 1.35 | 13.4 | 2.0M |
| Haywood Electric Member Corp | Cooperative | 776 | 554 | 5.09 | 16.9 | 30k |
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
- Henderson 32 h
- Transylvania (this county) 26 h
- Greenville, SC 25 h
- Oconee, SC 22 h
- Buncombe 20 h
- Haywood 17 h
- Jackson 16 h
- Pickens, SC 15 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 27,263 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 →