Power outage history
Rock Island County Illinois
6.3hours
without power for the average customer in a typical year, 2018–2025
22nd 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 Rock Island's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2020 was the worst well-recorded year, at 30 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Rock Island, 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 |
|---|---|---|---|---|---|---|
| Aug 10, 2020 | Thunderstorms | 56,765 | 68% | 5.3 d | 3.8 d | 2.1M |
| Apr 4, 2023 | Tornadoes | 18,519 | 22% | 34 h | 27 h | 239k |
| Jul 11, 2020 | Thunderstorms | 29,421 | 35% | 25 h | 16 h | 237k |
| Jun 3, 2025 | Thunderstorms | 18,306 | 22% | 24 h | 21 h | 181k |
| Jul 15, 2024 | Thunderstorms | 15,855 | 19% | 25 h | 21 h | 176k |
| Jul 13, 2016 | Thunderstorms | 10,319 | 12% | 16 h | 15 h | 69k |
| Mar 15, 2016 | Thunderstorms | 10,162 | 12% | 12 h | 5.5 h | 59k |
| Dec 28, 2015 | Winter storm | 7,713 | 9% | 11 h | 4.8 h | 40k |
| Apr 2, 2016 | No storm report | 6,666 | 8% | 8.0 h | 4.8 h | 26k |
| Sep 25, 2018 | Thunderstorms | 5,794 | 7% | 7.5 h | 8.8 h | 21k |
| Aug 4, 2016 | No storm report | 4,048 | 5% | 7.5 h | – | 19k |
| Aug 11, 2021 | Thunderstorms | 7,764 | 9% | 4.2 h | 3.5 h | 18k |
| Jul 21, 2017 | Thunderstorms | 6,095 | 7% | 4.0 h | 4.2 h | 16k |
| Jul 29, 2025 | Thunderstorms | 4,474 | 5% | 6.5 h | 5.0 h | 16k |
| Aug 18, 2025 | Thunderstorms | 6,891 | 8% | 2.5 h | 1.8 h | 15k |
| Oct 12, 2022 | No storm report | 5,921 | 7% | 2.8 h | 1.8 h | 14k |
| Mar 25, 2023 | Winter storm | 2,727 | 3% | 9.2 h | – | 13k |
| Jun 24, 2023 | Thunderstorms | 9,336 | 11% | 3.5 h | 2.8 h | 13k |
| Oct 6, 2016 | Tornadoes | 5,098 | 6% | 4.5 h | 3.8 h | 13k |
| Aug 29, 2018 | No storm report | 2,344 | 3% | 7.2 h | – | 13k |
| May 24, 2024 | Tornadoes | 5,049 | 6% | 4.5 h | 3.5 h | 13k |
| Mar 31, 2023 | Thunderstorms | 4,646 | 6% | 4.5 h | 5.2 h | 12k |
| Mar 6, 2017 | Thunderstorms | 4,379 | 5% | 4.8 h | 2.8 h | 12k |
| Dec 15, 2021 | Windstorm | 4,971 | 6% | 5.5 h | 6.2 h | 12k |
| Jan 12, 2024 | Winter storm | 1,705 | 2% | 14 h | – | 12k |
| Jul 14, 2024 | Thunderstorms | 2,785 | 3% | 5.2 h | – | 11k |
| Oct 24, 2021 | No storm report | 2,949 | 4% | 6.2 h | – | 11k |
| Jul 28, 2023 | Thunderstorms | 3,890 | 5% | 4.2 h | – | 11k |
| Aug 15, 2025 | Thunderstorms | 4,570 | 5% | 3.8 h | 4.2 h | 11k |
| Nov 3, 2023 | No storm report | 6,995 | 8% | 1.8 h | 1.2 h | 11k |
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 Rock Island from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Thunderstorms 80%
- No storm on record 11%
- Tornadoes 7.2%
- Winter storm 1.2%
- Windstorm 0.7%
Who keeps the lights on
Utilities serving Rock Island
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 |
|---|---|---|---|---|---|---|
| MidAmerican Energy Co | Investor Owned | 304 | 143 | 1.87 | 10.0 | 73k |
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
- Mercer 17 h
- Clinton, IA 13 h
- Scott, IA 9.2 h
- Rock Island (this county) 6.3 h
- Louisa, IA 5.2 h
- Whiteside 4.0 h
- Henry 3.5 h
- Muscatine, IA 1.3 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 83,685 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 →