Power outage history
Sumter County Florida
3.4hours
without power for the average customer in a typical year, 2018–2025
57th most of 67 in Florida 48% 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 Sumter'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 19 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Sumter, 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 10, 2017 | Hurricane Irma | 40,040 | 39% | 7.1 d | 4.4 d | 1.9M |
| Oct 9, 2024 | Hurricane Milton | 39,085 | 38% | 4.3 d | 3.4 d | 1.6M |
| Aug 5, 2024 | Hurricane Debby | 14,502 | 14% | 12 h | 6.8 h | 62k |
| Sep 29, 2022 | Hurricane Ian | 7,475 | 7% | 16 h | 8.5 h | 56k |
| Sep 26, 2024 | Hurricane Helene | 4,030 | 4% | 23 h | – | 44k |
| Aug 2, 2022 | No storm report | 18,029 | 18% | 4.0 h | 3.5 h | 35k |
| Sep 9, 2015 | No storm report | 12,228 | 12% | 3.2 h | 3.2 h | 26k |
| Nov 10, 2022 | Hurricane Nicole | 5,599 | 5% | 5.0 h | 5.5 h | 15k |
| Aug 15, 2017 | No storm report | 2,278 | 2% | 9.0 h | – | 13k |
| Apr 16, 2025 | No storm report | 16,575 | 16% | 48 min | 12 min | 12k |
| Dec 4, 2018 | No storm report | 11,118 | 11% | 1.0 h | 12 min | 11k |
| May 12, 2025 | No storm report | 2,873 | 3% | 3.8 h | – | 9.8k |
| May 25, 2023 | No storm report | 6,293 | 6% | 2.0 h | 1.0 h | 8.7k |
| Jun 14, 2022 | No storm report | 6,726 | 7% | 2.5 h | 1.0 h | 6.9k |
| Jun 15, 2022 | No storm report | 4,303 | 4% | 3.0 h | – | 6.8k |
| Jun 23, 2024 | No storm report | 2,095 | 2% | 2.8 h | – | 5.5k |
| Jul 7, 2018 | No storm report | 2,901 | 3% | 2.0 h | – | 5.3k |
| May 19, 2015 | No storm report | 2,579 | 3% | 2.8 h | – | 5.3k |
| Aug 27, 2022 | No storm report | 3,572 | 3% | 1.5 h | – | 5.1k |
| Jul 10, 2018 | No storm report | 2,909 | 3% | 1.8 h | – | 5.1k |
| May 17, 2022 | No storm report | 3,438 | 3% | 1.8 h | – | 5.1k |
| Dec 27, 2022 | No storm report | 2,532 | 2% | 3.2 h | – | 5.0k |
| May 5, 2019 | Thunderstorms | 1,718 | 2% | 3.5 h | – | 4.9k |
| Jun 20, 2025 | No storm report | 5,958 | 6% | 1.0 h | 1.5 h | 4.6k |
| Aug 18, 2025 | Flooding | 3,441 | 3% | 2.5 h | – | 4.5k |
| Sep 18, 2022 | No storm report | 3,582 | 4% | 1.2 h | – | 4.5k |
| May 19, 2023 | No storm report | 2,943 | 3% | 2.0 h | – | 4.5k |
| May 4, 2025 | No storm report | 2,328 | 2% | 2.0 h | – | 4.4k |
| May 27, 2022 | No storm report | 1,723 | 2% | 2.5 h | – | 4.3k |
| Dec 5, 2025 | No storm report | 1,107 | 1% | 3.8 h | – | 4.2k |
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 Sumter from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Tropical storm 84%
- No storm on record 16%
- Thunderstorms 0.5%
Who keeps the lights on
Utilities serving Sumter
As each utility reports to the Energy Information Administration for its whole Florida 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 Florida, LLC | Investor Owned | 87 | 82 | 0.97 | 18.4 | 1.8M |
| Sumter Electric Coop, Inc | Cooperative | 69 | 69 | 0.99 | 15.0 | 240k |
| Withlacoochee River Elec Coop | Cooperative | 106 | 106 | 1.45 | 13.7 | 232k |
| City of Leesburg | Municipal | – | – | – | 13.6 | 25k |
| City of Bushnell | FL | – | – | – | – | 9.3k |
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 102,391 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 →