Power outage history
Seminole County Florida
8.2hours
without power for the average customer in a typical year, 2018–2025
36th most of 67 in Florida 1.3× 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 Seminole'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 36 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Seminole, 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 | 198,450 | 98% | 9.2 d | 5.8 d | 16M |
| Sep 28, 2022 | Hurricane Ian | 136,129 | 67% | 5.2 d | 3.3 d | 6.3M |
| Oct 9, 2024 | Hurricane Milton | 90,312 | 45% | 4.0 d | 2.2 d | 3.2M |
| Oct 7, 2016 | Hurricane Matthew | 73,595 | 36% | 36 h | 36 h | 1.6M |
| Oct 8, 2016 | Hurricane Matthew | 17,671 | 9% | 2.8 d | 2.9 d | 468k |
| Nov 10, 2022 | Hurricane Nicole | 32,973 | 16% | 30 h | 23 h | 380k |
| Sep 26, 2024 | Hurricane Helene | 9,445 | 5% | 17 h | 9.8 h | 79k |
| Jun 9, 2019 | Thunderstorms | 9,323 | 5% | 13 h | 13 h | 54k |
| May 5, 2019 | Thunderstorms | 10,151 | 5% | 5.0 h | 4.5 h | 29k |
| Mar 19, 2018 | No storm report | 5,244 | 3% | 7.8 h | 6.0 h | 27k |
| Aug 21, 2020 | Thunderstorms | 7,024 | 3% | 4.2 h | 8.2 h | 18k |
| Jul 4, 2023 | No storm report | 10,639 | 5% | 2.8 h | 3.2 h | 16k |
| Jun 14, 2018 | No storm report | 12,603 | 6% | 1.5 h | 30 min | 16k |
| Jun 19, 2015 | Thunderstorms | 5,913 | 3% | 3.2 h | 6.2 h | 14k |
| Jun 18, 2022 | No storm report | 4,756 | 2% | 3.5 h | – | 13k |
| Jan 23, 2022 | No storm report | 2,544 | 1% | 4.5 h | – | 11k |
| Nov 22, 2019 | No storm report | 4,786 | 2% | 2.5 h | – | 11k |
| Apr 10, 2021 | Windstorm | 5,689 | 3% | 4.0 h | 8.2 h | 11k |
| Mar 2, 2015 | No storm report | 7,203 | 4% | 1.5 h | 7.2 h | 11k |
| Jan 17, 2020 | No storm report | 3,801 | 2% | 2.5 h | – | 9.5k |
| Jun 21, 2023 | No storm report | 3,079 | 2% | 3.0 h | – | 9.2k |
| Apr 11, 2021 | Thunderstorms | 3,538 | 2% | 3.0 h | – | 8.7k |
| Jun 22, 2023 | No storm report | 3,692 | 2% | 2.8 h | – | 8.4k |
| Apr 27, 2023 | Thunderstorms | 4,701 | 2% | 2.0 h | – | 8.3k |
| Jun 26, 2024 | No storm report | 2,887 | 1% | 3.5 h | – | 8.2k |
| Mar 25, 2016 | No storm report | 5,262 | 3% | 2.0 h | 4.5 h | 7.7k |
| Jun 8, 2022 | No storm report | 5,542 | 3% | 2.0 h | 4.8 h | 7.6k |
| Jun 22, 2021 | Thunderstorms | 3,592 | 2% | 3.2 h | – | 6.8k |
| Jan 15, 2016 | No storm report | 5,314 | 3% | 1.8 h | 1.5 h | 6.7k |
| Apr 7, 2022 | Thunderstorms | 4,585 | 2% | 3.2 h | – | 6.7k |
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 Seminole from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Tropical storm 94%
- No storm on record 4.4%
- Thunderstorms 1.5%
Who keeps the lights on
Utilities serving Seminole
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 |
|---|---|---|---|---|---|---|
| Florida Power & Light Co | Investor Owned | 47 | 45 | 0.46 | 14.6 | 5.3M |
| Duke Energy Florida, LLC | Investor Owned | 87 | 82 | 0.97 | 18.4 | 1.8M |
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
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 201,776 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 →