Power outage history
Hancock County Illinois
5.3hours
without power for the average customer in a typical year, 2018–2025
39th most of 101 in Illinois 19% 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 Hancock'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 25 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Hancock, 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 |
|---|---|---|---|---|---|---|
| Jun 29, 2023 | Thunderstorms | 5,674 | 63% | 4.0 d | 3.2 d | 198k |
| Mar 14, 2025 | Thunderstorms | 1,353 | 15% | 46 h | 17 h | 12k |
| Aug 5, 2023 | No storm report | 1,874 | 21% | 15 h | 7.2 h | 12k |
| Nov 11, 2015 | Thunderstorms | 1,984 | 22% | 24 h | 8.8 h | 12k |
| Jun 28, 2018 | Thunderstorms | 4,062 | 45% | 12 h | 6.0 h | 8.7k |
| Jun 25, 2019 | Thunderstorms | 1,166 | 13% | 9.8 h | 9.2 h | 7.9k |
| Nov 21, 2015 | No storm report | 1,206 | 13% | 12 h | 8.2 h | 7.6k |
| Mar 6, 2017 | Thunderstorms | 1,318 | 15% | 21 h | 10 h | 7.4k |
| Dec 28, 2015 | Ice storm | 494 | 5% | 41 h | 40 h | 7.2k |
| Oct 2, 2023 | No storm report | 4,774 | 53% | 1.8 h | 1.5 h | 6.7k |
| Aug 28, 2018 | Thunderstorms | 1,134 | 13% | 15 h | 10 h | 6.6k |
| Jun 20, 2015 | Thunderstorms | 987 | 11% | 17 h | 11 h | 6.1k |
| May 21, 2022 | No storm report | 1,071 | 12% | 8.2 h | 1.2 h | 5.8k |
| Jul 19, 2018 | Thunderstorms | 739 | 8% | 14 h | 4.8 h | 4.8k |
| Jul 9, 2021 | Thunderstorms | 509 | 6% | 12 h | 9.5 h | 4.4k |
| Jul 17, 2019 | Thunderstorms | 889 | 10% | 11 h | 9.8 h | 4.2k |
| Jun 15, 2016 | No storm report | 839 | 9% | 4.5 h | 2.8 h | 3.5k |
| Sep 5, 2020 | No storm report | 633 | 7% | 5.2 h | 5.0 h | 2.8k |
| Jul 25, 2015 | No storm report | 710 | 8% | 4.5 h | 1.8 h | 2.8k |
| Jun 10, 2015 | No storm report | 160 | 2% | 18 h | – | 2.7k |
| Jun 11, 2015 | No storm report | 622 | 7% | 5.0 h | 1.8 h | 2.7k |
| Feb 20, 2019 | No storm report | 1,521 | 17% | 2.5 h | 2.5 h | 2.7k |
| Jul 11, 2025 | No storm report | 384 | 4% | 14 h | – | 2.6k |
| Mar 3, 2024 | No storm report | 762 | 8% | 3.8 h | 1.8 h | 2.4k |
| May 29, 2019 | Flooding | 662 | 7% | 3.5 h | 2.2 h | 2.3k |
| Oct 31, 2019 | Winter storm | 533 | 6% | 6.2 h | 1.8 h | 2.2k |
| Jan 4, 2021 | No storm report | 631 | 7% | 5.8 h | 8.2 h | 2.1k |
| Sep 12, 2015 | No storm report | 840 | 9% | 2.5 h | 10 h | 2.1k |
| Jan 25, 2021 | No storm report | 2,400 | 27% | 2.2 h | 1.8 h | 2.1k |
| Oct 31, 2024 | No storm report | 394 | 4% | 10 h | – | 2.0k |
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 Hancock from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Thunderstorms 72%
- No storm on record 25%
- Winter storm 2.0%
- Flooding 0.9%
Who keeps the lights on
Utilities serving Hancock
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 |
| Adams Electric Coop | IL | 170 | 170 | 1.29 | 14.7 | 119k |
| McDonough Power Coop | IL | – | – | – | – | 55k |
| Western Illinois Elec Coop | IL | – | – | – | – | 36k |
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 9,010 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 →