Henry County Power Outage History
2018–2025 · Tennessee
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 |
|---|---|---|---|
| Mar 3, 2023 | 71 hrs | 13,970 (63%) | Strong Wind |
| Jul 19, 2023 | 23 hrs | 10,954 (50%) | Flash Flood |
| May 3, 2020 | 74 hrs | 9,930 (45%) | Thunderstorm Wind |
| May 4, 2021 | 1 hrs | 7,825 (36%) | Thunderstorm Wind |
| May 28, 2021 | 3 hrs | 6,723 (31%) | Unnamed event |
Over the 8 years from 2018 to 2025, Henry County recorded 864 distinct power outage events, averaging 1.9 hours per event.
The single worst outage on record in Henry County started March 3, 2023 (Strong Wind), lasting 71 hours and leaving up to 13,970 customers without power (63% of the county) at its peak.
June has historically been the worst month for outages in Henry County, with 102 events recorded during that month across the dataset.
Based on this history, Henry County earns a Reliability Grade of D, placing it in the 29th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Henry County's outage profile
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Similar counties in Tennessee
Counties with the closest reliability grade and national percentile to Henry County.
| County | Grade | National percentile |
|---|---|---|
| Meigs County | D | 29th |
| Tipton County | D | 30th |
| Macon County | D | 31st |
| Pickett County | D | 26th |
| Union County | D | 32nd |
FAQ
How often does power go out in Henry County?
Between 2018 and 2025, Henry County recorded 864 outage events, averaging 1.9 hours each.
What is Henry County's reliability grade?
Henry County has a Reliability Grade of D, in the 29th national percentile.
What was the worst power outage in Henry County?
The worst outage on record started March 3, 2023 (Strong Wind), lasting 71 hours and affecting up to 13,970 customers.