Power outage history
Marion County Illinois
6.0hours
without power for the average customer in a typical year, 2018–2025
26th most of 101 in Illinois close to 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 Marion's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2023 was the worst well-recorded year, at 12 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Marion, 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 |
|---|---|---|---|---|---|---|
| Jul 29, 2023 | Thunderstorms | 7,668 | 50% | 2.1 d | 41 h | 114k |
| May 26, 2024 | Tornadoes | 8,513 | 56% | 42 h | 14 h | 89k |
| Jun 17, 2022 | Thunderstorms | 3,683 | 24% | 33 h | 24 h | 57k |
| Jul 13, 2016 | Thunderstorms | 3,287 | 22% | 44 h | 30 h | 53k |
| Feb 16, 2021 | Winter storm | 8,582 | 56% | 5.5 h | 4.5 h | 36k |
| Jun 28, 2018 | Heat | 2,381 | 16% | 17 h | 11 h | 26k |
| Jul 29, 2024 | No storm report | 2,648 | 17% | 21 h | 15 h | 19k |
| Apr 2, 2024 | No storm report | 8,052 | 53% | 3.0 h | 2.5 h | 16k |
| Mar 31, 2023 | Tornadoes | 3,086 | 20% | 21 h | 4.0 h | 12k |
| Aug 1, 2024 | No storm report | 6,595 | 43% | 4.2 h | 1.2 h | 11k |
| Feb 24, 2016 | No storm report | 4,582 | 30% | 8.5 h | 4.0 h | 11k |
| Apr 19, 2025 | Thunderstorms | 1,643 | 11% | 11 h | 6.5 h | 9.9k |
| Jul 1, 2023 | Thunderstorms | 824 | 5% | 41 h | 2.0 d | 9.4k |
| Aug 10, 2020 | No storm report | 1,564 | 10% | 6.0 h | 4.8 h | 7.8k |
| May 7, 2016 | Thunderstorms | 1,129 | 7% | 12 h | 12 h | 6.9k |
| Nov 15, 2020 | No storm report | 1,633 | 11% | 9.2 h | 3.5 h | 6.8k |
| Apr 29, 2023 | No storm report | 2,485 | 16% | 3.5 h | 3.2 h | 6.5k |
| May 31, 2018 | Tropical Storm Alberto | 544 | 4% | 17 h | – | 6.5k |
| Apr 29, 2025 | Thunderstorms | 1,791 | 12% | 5.2 h | 3.2 h | 6.5k |
| Jan 1, 2025 | No storm report | 2,191 | 14% | 2.5 h | 2.2 h | 5.1k |
| Aug 12, 2021 | No storm report | 636 | 4% | 11 h | – | 5.1k |
| Jul 21, 2016 | Heat | 817 | 5% | 7.2 h | 6.8 h | 4.8k |
| Mar 14, 2025 | Thunderstorms | 747 | 5% | 13 h | – | 4.4k |
| Jan 9, 2020 | No storm report | 2,010 | 13% | 3.0 h | 2.0 h | 4.4k |
| Apr 29, 2017 | Thunderstorms | 964 | 6% | 9.0 h | 7.2 h | 4.0k |
| Mar 6, 2020 | No storm report | 993 | 7% | 7.0 h | 11 h | 3.9k |
| Mar 24, 2020 | No storm report | 1,930 | 13% | 3.0 h | 2.8 h | 3.8k |
| Apr 29, 2021 | No storm report | 291 | 2% | 13 h | – | 3.7k |
| May 30, 2025 | No storm report | 2,248 | 15% | 1.8 h | 1.8 h | 3.6k |
| Jan 26, 2016 | No storm report | 1,326 | 9% | 5.5 h | 3.8 h | 3.5k |
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 Marion from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- No storm on record 38%
- Thunderstorms 34%
- Tornadoes 16%
- Winter storm 5.9%
- Heat 4.3%
- Tropical storm 1.0%
Who keeps the lights on
Utilities serving Marion
As each utility reports to the Energy Information Administration for its whole Illinois territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| Ameren Illinois Company | Investor Owned | 287 | 130 | 1.19 | 16.7 | 1.1M |
| Clinton County Elec Coop, Inc | IL | – | – | – | 12.7 | 77k |
| Clay Electric Coop Inc | IL | 699 | – | 0.22 | – | 37k |
| Southwestern Electric Coop Inc | Cooperative | 241 | 195 | 1.92 | 15.4 | 24k |
| Tri-County Electric Coop, Inc (IL) | Cooperative | 132 | 63 | 1.64 | 16.2 | 16k |
| Wayne-White Counties Elec Coop | Cooperative | – | – | – | 16.4 | 12k |
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 15,234 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 →