Lake County Power Outage History
2015–2025 · Indiana
Average — typical outage frequency and duration nationally. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| May 16, 2025 | 71 hrs | 52,758 (21%) | Thunderstorm Wind |
| May 15, 2025 | 3 hrs | 47,618 (19%) | Thunderstorm Wind |
| Jul 16, 2024 | 7 hrs | 46,075 (18%) | Flash Flood |
| Jul 16, 2024 | 1 hrs | 44,543 (17%) | Flash Flood |
| Jul 16, 2024 | 0 hrs | 44,510 (17%) | Flash Flood |
Over the 11 years from 2015 to 2025, Lake County recorded 1,789 distinct power outage events, averaging 3.0 hours per event.
The single worst outage on record in Lake County started May 16, 2025 (Thunderstorm Wind), lasting 71 hours and leaving up to 52,758 customers without power (21% of the county) at its peak.
July has historically been the worst month for outages in Lake County, with 250 events recorded during that month across the dataset.
Based on this history, Lake County earns a Reliability Grade of C, placing it in the 52nd percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Indiana
Counties with the closest reliability grade and national percentile to Lake County.
| County | Grade | National percentile |
|---|---|---|
| Blackford County | C | 52nd |
| Randolph County | C | 51st |
| Switzerland County | C | 51st |
| Sullivan County | C | 53rd |
| Franklin County | C | 53rd |
FAQ
How often does power go out in Lake County?
Between 2015 and 2025, Lake County recorded 1,789 outage events, averaging 3.0 hours each.
What is Lake County's reliability grade?
Lake County has a Reliability Grade of C, in the 52nd national percentile.
What was the worst power outage in Lake County?
The worst outage on record started May 16, 2025 (Thunderstorm Wind), lasting 71 hours and affecting up to 52,758 customers.