Power outage history
Sedgwick County Kansas
2.2hours
without power for the average customer in a typical year, 2018–2025
61st most of 81 in Kansas 67% 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 Sedgwick's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2025 was the worst well-recorded year, at 4.4 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Sedgwick, 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 17, 2025 | Thunderstorms | 36,943 | 14% | 40 h | 36 h | 578k |
| Jan 9, 2024 | Winter storm | 10,314 | 4% | 12 h | 13 h | 73k |
| Jul 2, 2024 | Thunderstorms | 21,323 | 8% | 8.2 h | 9.0 h | 60k |
| May 20, 2025 | Thunderstorms | 6,653 | 3% | 14 h | 18 h | 54k |
| Dec 22, 2022 | Winter storm | 8,993 | 4% | 8.8 h | 5.5 h | 52k |
| May 25, 2024 | Thunderstorms | 8,937 | 3% | 6.8 h | 17 h | 43k |
| Jan 18, 2019 | No storm report | 6,078 | 2% | 13 h | 15 h | 42k |
| Aug 25, 2024 | Thunderstorms | 19,299 | 8% | 5.8 h | 3.8 h | 38k |
| Apr 29, 2022 | Thunderstorms | 8,804 | 3% | 5.0 h | 7.2 h | 32k |
| Jan 5, 2025 | Winter storm | 17,132 | 7% | 6.5 h | 2.2 h | 31k |
| Aug 19, 2018 | No storm report | 9,088 | 4% | 3.5 h | 1.2 h | 28k |
| Jul 5, 2016 | No storm report | 7,991 | 3% | 5.5 h | 5.0 h | 28k |
| Jun 23, 2019 | Thunderstorms | 6,655 | 3% | 6.2 h | 13 h | 27k |
| Jun 9, 2024 | Thunderstorms | 11,642 | 5% | 5.2 h | 9.0 h | 26k |
| Aug 13, 2024 | Thunderstorms | 9,821 | 4% | 3.0 h | 4.2 h | 20k |
| May 4, 2021 | No storm report | 8,272 | 3% | 2.8 h | 3.0 h | 20k |
| Jun 15, 2017 | Thunderstorms | 5,413 | 2% | 4.2 h | 9.2 h | 18k |
| Sep 7, 2021 | No storm report | 5,324 | 2% | 4.0 h | 3.8 h | 17k |
| Aug 8, 2016 | Flooding | 7,050 | 3% | 3.5 h | 9.8 h | 17k |
| Mar 29, 2021 | No storm report | 8,013 | 3% | 2.8 h | 3.5 h | 17k |
| May 19, 2024 | Thunderstorms | 7,614 | 3% | 3.5 h | 8.2 h | 17k |
| Jun 17, 2023 | Thunderstorms | 8,245 | 3% | 2.8 h | 4.0 h | 16k |
| Jun 11, 2021 | Thunderstorms | 4,991 | 2% | 3.8 h | – | 16k |
| Jul 28, 2016 | Thunderstorms | 4,457 | 2% | 4.5 h | – | 16k |
| Feb 27, 2021 | No storm report | 8,629 | 3% | 3.0 h | 48 min | 15k |
| Oct 23, 2022 | No storm report | 5,642 | 2% | 2.8 h | 12 min | 15k |
| May 29, 2018 | No storm report | 6,394 | 3% | 2.5 h | 1.5 h | 14k |
| Oct 4, 2018 | No storm report | 5,417 | 2% | 2.5 h | 2.2 h | 14k |
| Oct 24, 2025 | No storm report | 6,040 | 2% | 2.2 h | 1.5 h | 13k |
| Sep 21, 2017 | No storm report | 11,318 | 4% | 1.8 h | 12 min | 13k |
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 Sedgwick from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Thunderstorms 64%
- No storm on record 25%
- Winter storm 10%
- Windstorm 0.6%
Who keeps the lights on
Utilities serving Sedgwick
As each utility reports to the Energy Information Administration for its whole Kansas territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| Evergy Kansas South, Inc | Investor Owned | 244 | 84 | 1.39 | 14.5 | 306k |
| Butler Rural El Coop Assn, Inc | KS | 102 | 102 | 1.49 | 14.3 | 102k |
| Sedgwick County El Coop Assn Inc | KS | 207 | 207 | 1.69 | 13.5 | 91k |
| Sumner-Cowley Elec Coop, Inc | KS | – | – | – | 15.7 | 49k |
| City of Mulvane | KS | – | – | – | 13.2 | 24k |
| City of Mount Hope | KS | – | – | – | – | 4.1k |
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 255,977 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 →