Henry 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 |
|---|---|---|---|
| Oct 10, 2018 | 79 hrs | 7,533 (65%) | Hurricane Michael |
| Aug 21, 2022 | <1 hr | 5,935 (51%) | Thunderstorm Wind |
| Jan 4, 2020 | <1 hr | 5,704 (49%) | Unnamed event |
| Mar 4, 2019 | <1 hr | 5,337 (46%) | Hurricane Ivan |
| Jul 22, 2018 | 7 hrs | 5,140 (44%) | Thunderstorm Wind |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Henry County, Alabama that day.
Over the 9 years from 2017 to 2025, Henry County recorded 576 distinct power outage events, averaging 2.5 hours per event.
The single worst outage on record in Henry County started October 10, 2018 (Hurricane Michael), lasting 79 hours and leaving up to 7,533 customers without power (65% of the county) at its peak.
August has historically been the worst month for outages in Henry County, with 74 events recorded during that month across the dataset.
Based on this history, Henry County earns a Reliability Grade of C, placing it in the 44th percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Alabama
Counties with the closest reliability grade and national percentile to Henry County.
| County | Grade | National percentile |
|---|---|---|
| St. Clair County | C | 44th |
| Shelby County | C | 44th |
| Hale County | C | 46th |
| Blount County | C | 41st |
| Cullman County | C | 49th |
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 Henry County?
Between 2017 and 2025, Henry County recorded 576 outage events, averaging 2.5 hours each.
What is Henry County's reliability grade?
Henry County has a Reliability Grade of C, in the 44th national percentile.
What was the worst power outage in Henry County?
The worst outage on record started October 10, 2018 (Hurricane Michael), lasting 79 hours and affecting up to 7,533 customers.