Henderson County Power Outage History
2017–2025 · Tennessee
Top 20% most reliable nationally — infrequent, short outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Apr 20, 2025 | 4 hrs | 1,294 (8%) | Unnamed event |
| May 6, 2021 | 2 hrs | 1,263 (7%) | Thunderstorm Wind |
| Dec 24, 2022 | 0 hrs | 1,249 (7%) | Winter Storm Elliott |
| Dec 24, 2022 | 0 hrs | 1,249 (7%) | Winter Storm Elliott |
| Nov 27, 2022 | 28 hrs | 1,246 (7%) | Unnamed event |
Over the 9 years from 2017 to 2025, Henderson County recorded 77 distinct power outage events, averaging 2.5 hours per event.
The single worst outage on record in Henderson County started April 20, 2025, lasting 4 hours and leaving up to 1,294 customers without power (8% of the county) at its peak.
May has historically been the worst month for outages in Henderson County, with 18 events recorded during that month across the dataset.
Based on this history, Henderson County earns a Reliability Grade of A, placing it in the 94th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Henderson County's outage profile
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Similar counties in Tennessee
Counties with the closest reliability grade and national percentile to Henderson County.
| County | Grade | National percentile |
|---|---|---|
| Morgan County | A | 95th |
| Lauderdale County | A | 95th |
| Dyer County | A | 96th |
| Unicoi County | A | 96th |
| Rutherford County | A | 92nd |
FAQ
How often does power go out in Henderson County?
Between 2017 and 2025, Henderson County recorded 77 outage events, averaging 2.5 hours each.
What is Henderson County's reliability grade?
Henderson County has a Reliability Grade of A, in the 94th national percentile.
What was the worst power outage in Henderson County?
The worst outage on record started April 20, 2025, lasting 4 hours and affecting up to 1,294 customers.