Dallas County Power Outage History
2014–2025 · Texas
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 |
|---|---|---|---|
| May 28, 2024 | 211 hrs | 386,856 (34%) | Hail |
| Feb 14, 2021 | 102 hrs | 358,650 (32%) | Winter Storm Uri |
| Jun 9, 2019 | 107 hrs | 313,327 (28%) | Thunderstorm Wind |
| Sep 4, 2022 | 58 hrs | 120,548 (11%) | Drought |
| Mar 4, 2025 | 69 hrs | 107,071 (9%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Dallas County recorded 9,047 distinct power outage events, averaging 2.7 hours per event.
The single worst outage on record in Dallas County started May 28, 2024 (Hail), lasting 211 hours and leaving up to 386,856 customers without power (34% of the county) at its peak.
July has historically been the worst month for outages in Dallas County, with 882 events recorded during that month across the dataset.
Based on this history, Dallas 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 Texas
Counties with the closest reliability grade and national percentile to Dallas County.
| County | Grade | National percentile |
|---|---|---|
| Dawson County | D | 33rd |
| Mitchell County | D | 34th |
| Refugio County | D | 32nd |
| Pecos County | D | 32nd |
| Burleson County | D | 32nd |
FAQ
How often does power go out in Dallas County?
Between 2014 and 2025, Dallas County recorded 9,047 outage events, averaging 2.7 hours each.
What is Dallas County's reliability grade?
Dallas County has a Reliability Grade of D, in the 33rd national percentile.
What was the worst power outage in Dallas County?
The worst outage on record started May 28, 2024 (Hail), lasting 211 hours and affecting up to 386,856 customers.