Delaware County Power Outage History
2014–2025 · Oklahoma
Worse than average — more frequent or longer outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jun 18, 2023 | 69 hrs | 14,471 (45%) | Thunderstorm Wind |
| May 31, 2018 | 0 hrs | 12,215 (38%) | Unnamed event |
| Mar 9, 2016 | 0 hrs | 9,932 (31%) | Unnamed event |
| Jul 28, 2017 | 3 hrs | 9,298 (29%) | Unnamed event |
| Aug 18, 2016 | 2 hrs | 8,376 (26%) | Unnamed event |
Over the 12 years from 2014 to 2025, Delaware County recorded 1,363 distinct power outage events, averaging 1.8 hours per event.
The single worst outage on record in Delaware County started June 18, 2023 (Thunderstorm Wind), lasting 69 hours and leaving up to 14,471 customers without power (45% of the county) at its peak.
May has historically been the worst month for outages in Delaware County, with 169 events recorded during that month across the dataset.
Based on this history, Delaware County earns a Reliability Grade of D, placing it in the 33rd percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Oklahoma
Counties with the closest reliability grade and national percentile to Delaware County.
| County | Grade | National percentile |
|---|---|---|
| McCurtain County | D | 33rd |
| Creek County | D | 35th |
| Love County | D | 32nd |
| Tulsa County | D | 35th |
| Pittsburg County | D | 35th |
FAQ
How often does power go out in Delaware County?
Between 2014 and 2025, Delaware County recorded 1,363 outage events, averaging 1.8 hours each.
What is Delaware County's reliability grade?
Delaware County has a Reliability Grade of D, in the 33rd national percentile.
What was the worst power outage in Delaware County?
The worst outage on record started June 18, 2023 (Thunderstorm Wind), lasting 69 hours and affecting up to 14,471 customers.