Henry County Power Outage History
2015–2025 · Missouri
Better than average — fewer or shorter 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 |
|---|---|---|---|
| Jul 31, 2023 | 28 hrs | 4,882 (34%) | Drought |
| May 24, 2015 | 3 hrs | 4,787 (34%) | Unnamed event |
| May 17, 2015 | 21 hrs | 3,602 (25%) | Tornado |
| Nov 25, 2017 | 2 hrs | 2,912 (21%) | Unnamed event |
| Jul 14, 2017 | 2 hrs | 2,882 (20%) | Unnamed event |
Over the 11 years from 2015 to 2025, Henry County recorded 689 distinct power outage events, averaging 2.4 hours per event.
The single worst outage on record in Henry County started July 31, 2023 (Drought), lasting 28 hours and leaving up to 4,882 customers without power (34% of the county) at its peak.
June has historically been the worst month for outages in Henry County, with 83 events recorded during that month across the dataset.
Based on this history, Henry County earns a Reliability Grade of B, placing it in the 62nd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Henry County's outage profile
See more picks in our Best Small Power Stations (Under 1,000Wh) roundup.
Outage-prep kit
See our outage-prep guides.
Similar counties in Missouri
Counties with the closest reliability grade and national percentile to Henry County.
| County | Grade | National percentile |
|---|---|---|
| Stone County | B | 62nd |
| New Madrid County | B | 61st |
| Madison County | B | 60th |
| Ripley County | B | 63rd |
| Barry County | B | 63rd |
FAQ
How often does power go out in Henry County?
Between 2015 and 2025, Henry County recorded 689 outage events, averaging 2.4 hours each.
What is Henry County's reliability grade?
Henry County has a Reliability Grade of B, in the 62nd national percentile.
What was the worst power outage in Henry County?
The worst outage on record started July 31, 2023 (Drought), lasting 28 hours and affecting up to 4,882 customers.