Sherman CountyPower Outage History
2014–2025 · Texas
Better than average — fewer or shorter outages than most counties.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 6, 2023 | 16 hrs | 4,450 (89%) | Thunderstorm Wind |
| Dec 27, 2018 | 13 hrs | 1,600 (32%) | Winter Storm |
| Jun 20, 2020 | 6 hrs | 1,310 (26%) | Drought |
| Jun 13, 2023 | 6 hrs | 1,278 (26%) | Drought |
| Aug 9, 2025 | 5 hrs | 1,251 (25%) | Unnamed event |
Over the 12 years from 2014 to 2025, Sherman County recorded 225 distinct power outage events, averaging 3.3 hours per event.
The single worst outage on record in Sherman County started August 6, 2023 (Thunderstorm Wind), lasting 16 hours and leaving up to 4,450 customers without power (89% of the county) at its peak.
August has historically been the worst month for outages in Sherman County, with 30 events recorded during that month across the dataset.
Based on this history, Sherman County earns a Reliability Grade of B, placing it in the 73rd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Sherman County's outage profile
See more picks in our Best Small Power Stations (Under 1,000Wh) roundup.
Outage-prep kit
See our outage-prep guides or the Texas storm prep checklist.
Similar counties in Texas
Counties with the closest reliability grade and national percentile to Sherman County.
| County | Grade | National percentile |
|---|---|---|
| Brazos County | B | 73rd |
| Wilbarger County | B | 73rd |
| Hays County | B | 72nd |
| Atascosa County | B | 73rd |
| Gaines County | B | 73rd |
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 Sherman County?
Between 2014 and 2025, Sherman County recorded 225 outage events, averaging 3.3 hours each.
What is Sherman County's reliability grade?
Sherman County has a Reliability Grade of B, in the 73rd national percentile.
What was the worst power outage in Sherman County?
The worst outage on record started August 6, 2023 (Thunderstorm Wind), lasting 16 hours and affecting up to 4,450 customers.