Harris County Power Outage History
2014–2025 · Georgia
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 |
|---|---|---|---|
| Sep 11, 2017 | 90 hrs | 9,423 (54%) | Tropical Storm Irma |
| Mar 3, 2019 | 51 hrs | 9,271 (53%) | Tornado |
| Feb 16, 2025 | 42 hrs | 7,824 (45%) | Unnamed event |
| Feb 12, 2019 | 16 hrs | 4,993 (29%) | Unnamed event |
| Dec 11, 2024 | 8 hrs | 4,169 (24%) | Unnamed event |
Over the 12 years from 2014 to 2025, Harris County recorded 816 distinct power outage events, averaging 2.7 hours per event.
The single worst outage on record in Harris County started September 11, 2017 (Tropical Storm Irma), lasting 90 hours and leaving up to 9,423 customers without power (54% of the county) at its peak.
July has historically been the worst month for outages in Harris County, with 105 events recorded during that month across the dataset.
Based on this history, Harris 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 Georgia
Counties with the closest reliability grade and national percentile to Harris County.
| County | Grade | National percentile |
|---|---|---|
| Tattnall County | D | 32nd |
| Stephens County | D | 32nd |
| Heard County | D | 32nd |
| Chattooga County | D | 33rd |
| Seminole County | D | 33rd |
FAQ
How often does power go out in Harris County?
Between 2014 and 2025, Harris County recorded 816 outage events, averaging 2.7 hours each.
What is Harris County's reliability grade?
Harris County has a Reliability Grade of D, in the 33rd national percentile.
What was the worst power outage in Harris County?
The worst outage on record started September 11, 2017 (Tropical Storm Irma), lasting 90 hours and affecting up to 9,423 customers.