Rockwall CountyPower Outage History
What this grade means
Average — typical outage frequency and duration nationally. This county sits in the middle of the national distribution — its outage frequency and duration over the past 12 years are close to the nationwide median, neither notably better nor worse than most other US counties. A typical amount of backup-power preparedness is reasonable here.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| May 28, 2024 | 124 hrs | 31,961 (41%) | Thunderstorm Wind |
| Feb 15, 2021 | 86 hrs | 18,543 (24%) | Winter Storm Uri |
| Mar 17, 2021 | 14 hrs | 11,740 (15%) | Thunderstorm Wind |
| Apr 7, 2022 | 1 hrs | 7,998 (10%) | Drought |
| May 16, 2022 | 21 hrs | 7,470 (10%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Rockwall County, Texas that day.
Over the 12 years from 2014 to 2025, Rockwall County recorded 594 distinct power outage events, averaging 2.5 hours per event.
The single worst outage on record in Rockwall County started May 28, 2024 (Thunderstorm Wind), lasting 124 hours and leaving up to 31,961 customers without power (41% of the county) at its peak.
May has historically been the worst month for outages in Rockwall County, with 75 events recorded during that month across the dataset.
Based on this history, Rockwall County earns a Reliability Grade of C, placing it in the 59th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Texas
Counties with the closest reliability grade and national percentile to Rockwall County.
| County | Grade | National percentile |
|---|---|---|
| Oldham County | C | 59th |
| Potter County | C | 59th |
| Hartley County | C | 60th |
| Castro County | C | 58th |
| Bowie County | B | 60th |
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 Rockwall County?
Between 2014 and 2025, Rockwall County recorded 594 outage events, averaging 2.5 hours each.
What is Rockwall County's reliability grade?
Rockwall County has a Reliability Grade of C, in the 59th national percentile.
What was the worst power outage in Rockwall County?
The worst outage on record started May 28, 2024 (Thunderstorm Wind), lasting 124 hours and affecting up to 31,961 customers.