Power outage history
Delta County Michigan
3.8hours
without power for the average customer in a typical year, 2018–2025
81st most of 83 in Michigan 42% 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 Delta'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 8.4 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Delta, 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 |
|---|---|---|---|---|---|---|
| Apr 2, 2024 | Winter storm | 6,367 | 26% | 2.3 d | 31 h | 154k |
| Oct 6, 2015 | No storm report | 4,590 | 19% | 2.0 d | 2.0 d | 118k |
| Mar 23, 2022 | Ice storm | 4,446 | 18% | 2.1 d | 42 h | 78k |
| Aug 2, 2022 | Thunderstorms | 1,483 | 6% | 2.4 d | 2.1 d | 74k |
| Dec 29, 2025 | Winter storm | 2,635 | 11% | 36 h | 28 h | 43k |
| Nov 27, 2019 | No storm report | 1,602 | 7% | 34 h | 42 h | 38k |
| Sep 21, 2018 | No storm report | 2,571 | 10% | 15 h | 5.0 h | 18k |
| Jul 20, 2019 | No storm report | 2,226 | 9% | 9.2 h | 6.0 h | 15k |
| Sep 15, 2015 | No storm report | 4,680 | 19% | 3.0 h | 3.0 h | 13k |
| May 25, 2021 | Thunderstorms | 2,751 | 11% | 5.2 h | 4.0 h | 11k |
| Oct 18, 2022 | Windstorm | 955 | 4% | 16 h | – | 10k |
| Dec 11, 2021 | Winter storm | 1,428 | 6% | 16 h | 12 h | 10k |
| May 22, 2024 | Thunderstorms | 883 | 4% | 17 h | – | 10k |
| Jul 6, 2020 | Thunderstorms | 2,014 | 8% | 5.5 h | 4.0 h | 8.2k |
| Dec 24, 2015 | Windstorm | 1,598 | 7% | 12 h | 11 h | 8.1k |
| May 20, 2022 | No storm report | 1,750 | 7% | 4.0 h | 2.0 h | 6.8k |
| Jun 11, 2017 | Thunderstorms | 1,307 | 5% | 6.5 h | 3.5 h | 6.7k |
| Jun 15, 2022 | Thunderstorms | 1,806 | 7% | 4.8 h | 1.8 h | 6.5k |
| Nov 26, 2025 | No storm report | 839 | 3% | 7.8 h | – | 6.2k |
| Feb 26, 2019 | No storm report | 5,046 | 21% | 2.0 h | 48 min | 6.2k |
| Dec 16, 2021 | No storm report | 1,468 | 6% | 8.8 h | 12 h | 6.2k |
| Aug 31, 2015 | No storm report | 4,670 | 19% | 2.2 h | 13 h | 6.1k |
| Dec 15, 2022 | No storm report | 782 | 3% | 8.2 h | – | 5.5k |
| Mar 30, 2025 | Ice storm | 367 | 2% | 18 h | – | 4.7k |
| Nov 1, 2020 | No storm report | 718 | 3% | 8.5 h | – | 4.6k |
| May 19, 2023 | No storm report | 787 | 3% | 5.2 h | – | 4.1k |
| May 2, 2023 | No storm report | 1,156 | 5% | 3.5 h | – | 4.0k |
| Jun 8, 2024 | No storm report | 1,050 | 4% | 4.5 h | – | 3.9k |
| Jul 15, 2025 | No storm report | 2,590 | 11% | 1.5 h | 1.5 h | 3.9k |
| Aug 16, 2024 | No storm report | 795 | 3% | 5.2 h | – | 3.8k |
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 Delta from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Winter storm 33%
- No storm on record 31%
- Thunderstorms 19%
- Ice storm 13%
- Windstorm 2.1%
Who keeps the lights on
Utilities serving Delta
As each utility reports to the Energy Information Administration for its whole Michigan territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| DTE Electric Company | Investor Owned | 192 | 151 | 1.16 | 20.3 | 2.1M |
| Upper Peninsula Power Company | Investor Owned | 446 | 190 | 2.20 | 28.0 | 48k |
| Cloverland Electric Co-op | Cooperative | 1,020 | 357 | 4.41 | 14.3 | 36k |
| City of Escanaba | MI | 48 | – | 0.52 | 12.1 | 35k |
| Upper Michigan Energy Resources Corp. | Investor Owned | 1,249 | 240 | 2.46 | 17.5 | 33k |
| Alger-Delta Coop Electric Assn | Cooperative | 1,152 | 257 | 3.07 | 23.2 | 9.8k |
| City of Gladstone | Municipal | – | – | – | 16.9 | 2.5k |
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
- Menominee 12 h
- Alger 8.2 h
- Schoolcraft 7.4 h
- Marquette 4.7 h
- Delta (this county) 3.8 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 24,519 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 →