Delta CountyPower Outage History
2014–2025 · Texas
Worse than average — more frequent or longer outages than most counties. This county's recorded history shows more frequent outages and/or longer restoration times than most US counties over the same 12-year period. If you live here, it's worth taking backup power more seriously than an average household would.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Feb 15, 2021 | 38 hrs | 1,949 (53%) | Winter Storm Uri |
| May 7, 2023 | 4 hrs | 1,690 (46%) | Unnamed event |
| Feb 17, 2021 | 4 hrs | 1,448 (39%) | Winter Storm Uri |
| Jun 16, 2023 | 39 hrs | 1,435 (39%) | Thunderstorm Wind |
| May 9, 2024 | 9 hrs | 1,417 (38%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Delta County recorded 344 distinct power outage events, averaging 3.2 hours per event.
The single worst outage on record in Delta County started February 15, 2021 (Winter Storm Uri), lasting 38 hours and leaving up to 1,949 customers without power (53% of the county) at its peak.
June has historically been the worst month for outages in Delta County, with 52 events recorded during that month across the dataset.
Based on this history, Delta County earns a Reliability Grade of D, placing it in the 39th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Delta County's outage profile
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Read our mission →Similar counties in Texas
Counties with the closest reliability grade and national percentile to Delta County.
| County | Grade | National percentile |
|---|---|---|
| Llano County | D | 39th |
| Lee County | D | 39th |
| Deaf Smith County | D | 39th |
| Frio County | D | 39th |
| Menard County | D | 40th |
Most reliable counties in Texas
The top 3 counties in Texas by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Zavala County | A | 95th |
| Jasper County | A | 94th |
| Fayette County | A | 91st |
Least reliable counties in Texas
The bottom 3 counties in Texas by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Trinity County | F | 2nd |
| Orange County | F | 2nd |
| Marion County | F | 4th |
Most reliable counties nationally
The top 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | South Dakota | A | 100th |
| Clearwater County | Minnesota | A | 99th |
| Limestone County | Alabama | A | 99th |
Least reliable counties nationally
The bottom 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | West Virginia | F | 0th |
| Lincoln County | West Virginia | F | 0th |
| Cameron Parish | Louisiana | F | 0th |
FAQ
How often does power go out in Delta County?
Between 2014 and 2025, Delta County recorded 344 outage events, averaging 3.2 hours each.
What is Delta County's reliability grade?
Delta County has a Reliability Grade of D, in the 39th national percentile.
What was the worst power outage in Delta County?
The worst outage on record started February 15, 2021 (Winter Storm Uri), lasting 38 hours and affecting up to 1,949 customers.