Power outage history
Ontario County New York
2.7hours
without power for the average customer in a typical year, 2018–2025
57th most of 62 in New York 59% 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 Ontario'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 4.2 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Ontario, 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 |
|---|---|---|---|---|---|---|
| Dec 23, 2022 | No storm report | 8,873 | 12% | 35 h | 4.5 h | 86k |
| Jan 9, 2024 | Windstorm | 3,924 | 5% | 41 h | 22 h | 81k |
| Apr 4, 2018 | Windstorm | 4,587 | 6% | 23 h | 20 h | 60k |
| Jul 15, 2024 | Thunderstorms | 6,447 | 8% | 11 h | 10 h | 41k |
| Dec 11, 2021 | Windstorm | 3,500 | 5% | 19 h | – | 41k |
| Jun 16, 2022 | Thunderstorms | 7,490 | 10% | 21 h | 20 h | 40k |
| Feb 28, 2024 | Windstorm | 4,484 | 6% | 16 h | 15 h | 32k |
| Mar 26, 2021 | No storm report | 3,867 | 5% | 8.0 h | 2.2 h | 19k |
| May 18, 2017 | Thunderstorms | 1,510 | 2% | 14 h | – | 17k |
| Feb 29, 2016 | No storm report | 6,548 | 9% | 4.5 h | 3.8 h | 17k |
| May 16, 2022 | No storm report | 2,785 | 4% | 6.2 h | – | 16k |
| Jan 2, 2016 | No storm report | 6,180 | 8% | 3.2 h | 1.0 h | 15k |
| Jul 18, 2015 | No storm report | 5,932 | 8% | 3.8 h | 2.0 h | 15k |
| Dec 19, 2025 | No storm report | 3,893 | 5% | 4.8 h | 1.5 h | 13k |
| Mar 16, 2025 | No storm report | 2,990 | 4% | 7.8 h | – | 13k |
| Jun 30, 2024 | Thunderstorms | 1,975 | 3% | 9.5 h | – | 13k |
| Apr 2, 2025 | No storm report | 2,171 | 3% | 5.8 h | – | 12k |
| Mar 23, 2023 | No storm report | 7,107 | 9% | 1.8 h | 1.8 h | 11k |
| Mar 3, 2023 | No storm report | 2,311 | 3% | 11 h | – | 11k |
| Jan 1, 2019 | Windstorm | 1,872 | 2% | 8.5 h | – | 11k |
| Apr 22, 2018 | No storm report | 7,159 | 9% | 2.8 h | 2.0 h | 11k |
| Jun 21, 2021 | Thunderstorms | 2,089 | 3% | 7.0 h | – | 11k |
| Feb 16, 2025 | No storm report | 4,174 | 5% | 3.5 h | 1.5 h | 10k |
| Apr 4, 2015 | No storm report | 4,318 | 6% | 2.2 h | 2.2 h | 9.7k |
| Sep 16, 2025 | No storm report | 7,637 | 10% | 1.2 h | 1.2 h | 9.5k |
| Nov 15, 2020 | Thunderstorms | 7,048 | 9% | 2.2 h | 1.8 h | 9.3k |
| Oct 15, 2017 | Thunderstorms | 2,188 | 3% | 5.8 h | – | 9.2k |
| Nov 1, 2019 | Windstorm | 4,163 | 5% | 5.2 h | 2.2 h | 8.9k |
| Oct 19, 2025 | No storm report | 7,503 | 10% | 7.2 h | 1.0 h | 8.8k |
| Aug 24, 2025 | Thunderstorms | 5,415 | 7% | 3.2 h | 3.2 h | 8.6k |
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 Ontario from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 53%
- Windstorm 26%
- Thunderstorms 18%
- Winter storm 1.1%
- Flooding 0.9%
- Tropical storm 0.6%
Who keeps the lights on
Utilities serving Ontario
As each utility reports to the Energy Information Administration for its whole New York territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| Niagara Mohawk Power Corp. | Investor Owned | 242 | 140 | 1.39 | 19.9 | 1.5M |
| New York State Elec & Gas Corp | Investor Owned | 302 | 146 | 1.85 | 22.6 | 794k |
| Rochester Gas & Electric Corp | Investor Owned | 133 | 89 | 1.22 | 22.0 | 354k |
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 75,985 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 →