Henry County Power Outage History
2014–2025 · Illinois
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 |
|---|---|---|---|
| Aug 10, 2020 | 113 hrs | 6,594 (10%) | Thunderstorm Wind |
| Jul 16, 2024 | 67 hrs | 5,922 (9%) | Thunderstorm Wind |
| Mar 31, 2023 | 31 hrs | 5,312 (8%) | Thunderstorm Wind |
| Jan 11, 2020 | 6 hrs | 4,035 (6%) | Unnamed event |
| Jul 12, 2020 | 17 hrs | 3,846 (6%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Henry County recorded 313 distinct power outage events, averaging 3.1 hours per event.
The single worst outage on record in Henry County started August 10, 2020 (Thunderstorm Wind), lasting 113 hours and leaving up to 6,594 customers without power (10% of the county) at its peak.
June has historically been the worst month for outages in Henry County, with 41 events recorded during that month across the dataset.
Based on this history, Henry County earns a Reliability Grade of B, placing it in the 78th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Henry County's outage profile
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Similar counties in Illinois
Counties with the closest reliability grade and national percentile to Henry County.
| County | Grade | National percentile |
|---|---|---|
| Champaign County | B | 79th |
| Cook County | B | 79th |
| Kane County | B | 79th |
| Hamilton County | B | 77th |
| Montgomery County | A | 80th |
FAQ
How often does power go out in Henry County?
Between 2014 and 2025, Henry County recorded 313 outage events, averaging 3.1 hours each.
What is Henry County's reliability grade?
Henry County has a Reliability Grade of B, in the 78th national percentile.
What was the worst power outage in Henry County?
The worst outage on record started August 10, 2020 (Thunderstorm Wind), lasting 113 hours and affecting up to 6,594 customers.