Shelby CountyPower Outage History
What this grade means
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 |
|---|---|---|---|
| May 31, 2024 | 74 hrs | 4,178 (29%) | Thunderstorm Wind |
| Jul 8, 2024 | 47 hrs | 4,164 (29%) | Tropical Storm Beryl |
| Jun 16, 2023 | 44 hrs | 3,770 (26%) | Thunderstorm Wind |
| Aug 27, 2020 | 71 hrs | 3,727 (26%) | Hurricane Laura |
| Jun 8, 2025 | 51 hrs | 3,609 (25%) | Thunderstorm Wind |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Shelby County, Texas that day.
Over the 11 years from 2015 to 2025, Shelby County recorded 475 distinct power outage events, averaging 4.3 hours per event.
The single worst outage on record in Shelby County started May 31, 2024 (Thunderstorm Wind), lasting 74 hours and leaving up to 4,178 customers without power (29% of the county) at its peak.
May has historically been the worst month for outages in Shelby County, with 58 events recorded during that month across the dataset.
Based on this history, Shelby County earns a Reliability Grade of D, placing it in the 32nd percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Texas
Counties with the closest reliability grade and national percentile to Shelby County.
| County | Grade | National percentile |
|---|---|---|
| Hopkins County | D | 32nd |
| Comanche County | D | 31st |
| Burleson County | D | 32nd |
| Travis County | D | 31st |
| Pecos County | D | 32nd |
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 Shelby County?
Between 2015 and 2025, Shelby County recorded 475 outage events, averaging 4.3 hours each.
What is Shelby County's reliability grade?
Shelby County has a Reliability Grade of D, in the 32nd national percentile.
What was the worst power outage in Shelby County?
The worst outage on record started May 31, 2024 (Thunderstorm Wind), lasting 74 hours and affecting up to 4,178 customers.