Henderson CountyPower Outage History
2014–2025 · Illinois
Bottom 20% least reliable nationally — frequent and/or long outages.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Oct 22, 2015 | 3 hrs | 3,735 (91%) | Unnamed event |
| Dec 28, 2015 | 42 hrs | 3,633 (89%) | Ice Storm |
| Dec 11, 2021 | 5 hrs | 2,600 (64%) | Unnamed event |
| Dec 4, 2023 | 3 hrs | 2,579 (63%) | Unnamed event |
| Dec 4, 2023 | 3 hrs | 2,578 (63%) | Unnamed event |
Over the 12 years from 2014 to 2025, Henderson County recorded 375 distinct power outage events, averaging 3.8 hours per event.
The single worst outage on record in Henderson County started October 22, 2015, lasting 3 hours and leaving up to 3,735 customers without power (91% of the county) at its peak.
June has historically been the worst month for outages in Henderson County, with 61 events recorded during that month across the dataset.
Based on this history, Henderson County earns a Reliability Grade of F, placing it in the 19th percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Illinois
Counties with the closest reliability grade and national percentile to Henderson County.
| County | Grade | National percentile |
|---|---|---|
| Marshall County | D | 22nd |
| Stark County | F | 13th |
| Mercer County | F | 11th |
| Putnam County | D | 26th |
| Edgar County | D | 29th |
Most reliable counties in Illinois
The top 3 counties in Illinois by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Wabash County | A | 97th |
| Massac County | A | 94th |
| Kendall County | A | 93rd |
Least reliable counties in Illinois
The bottom 3 counties in Illinois by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Mercer County | F | 11th |
| Stark County | F | 13th |
| Henderson County | F | 19th |
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 Henderson County?
Between 2014 and 2025, Henderson County recorded 375 outage events, averaging 3.8 hours each.
What is Henderson County's reliability grade?
Henderson County has a Reliability Grade of F, in the 19th national percentile.
What was the worst power outage in Henderson County?
The worst outage on record started October 22, 2015, lasting 3 hours and affecting up to 3,735 customers.