Hamilton County Power Outage History
2014–2025 · Indiana
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 |
|---|---|---|---|
| Apr 9, 2020 | 29 hrs | 25,996 (16%) | Thunderstorm Wind |
| May 16, 2019 | 28 hrs | 20,197 (12%) | Thunderstorm Wind |
| Sep 1, 2023 | 1 hrs | 18,839 (11%) | Excessive Heat |
| Sep 27, 2024 | 33 hrs | 17,791 (11%) | Tropical Storm Helene |
| Jun 29, 2023 | 3 hrs | 13,803 (8%) | Hail |
Over the 12 years from 2014 to 2025, Hamilton County recorded 980 distinct power outage events, averaging 2.3 hours per event.
The single worst outage on record in Hamilton County started April 9, 2020 (Thunderstorm Wind), lasting 29 hours and leaving up to 25,996 customers without power (16% of the county) at its peak.
June has historically been the worst month for outages in Hamilton County, with 121 events recorded during that month across the dataset.
Based on this history, Hamilton County earns a Reliability Grade of B, placing it in the 78th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Hamilton County's outage profile
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Outage-prep kit
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Similar counties in Indiana
Counties with the closest reliability grade and national percentile to Hamilton County.
| County | Grade | National percentile |
|---|---|---|
| Warren County | B | 78th |
| Parke County | B | 77th |
| Adams County | B | 77th |
| Clinton County | A | 80th |
| Ohio County | A | 80th |
FAQ
How often does power go out in Hamilton County?
Between 2014 and 2025, Hamilton County recorded 980 outage events, averaging 2.3 hours each.
What is Hamilton County's reliability grade?
Hamilton County has a Reliability Grade of B, in the 78th national percentile.
What was the worst power outage in Hamilton County?
The worst outage on record started April 9, 2020 (Thunderstorm Wind), lasting 29 hours and affecting up to 25,996 customers.