Cuyahoga County Power Outage History
2014–2025 · Ohio
Worse than average — more frequent or longer 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 6, 2024 | 169 hrs | 223,470 (37%) | Tornado |
| Aug 23, 2023 | 144 hrs | 70,828 (12%) | Flash Flood |
| Aug 11, 2021 | 98 hrs | 68,713 (11%) | Thunderstorm Wind |
| Mar 8, 2017 | 62 hrs | 59,429 (10%) | Unnamed event |
| Aug 11, 2016 | 14 hrs | 58,546 (10%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Cuyahoga County recorded 4,900 distinct power outage events, averaging 3.0 hours per event.
The single worst outage on record in Cuyahoga County started August 6, 2024 (Tornado), lasting 169 hours and leaving up to 223,470 customers without power (37% of the county) at its peak.
July has historically been the worst month for outages in Cuyahoga County, with 606 events recorded during that month across the dataset.
Based on this history, Cuyahoga County earns a Reliability Grade of D, placing it in the 28th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Cuyahoga County's outage profile
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Similar counties in Ohio
Counties with the closest reliability grade and national percentile to Cuyahoga County.
| County | Grade | National percentile |
|---|---|---|
| Carroll County | D | 29th |
| Athens County | D | 30th |
| Gallia County | D | 30th |
| Ashtabula County | D | 26th |
| Jackson County | D | 25th |
FAQ
How often does power go out in Cuyahoga County?
Between 2014 and 2025, Cuyahoga County recorded 4,900 outage events, averaging 3.0 hours each.
What is Cuyahoga County's reliability grade?
Cuyahoga County has a Reliability Grade of D, in the 28th national percentile.
What was the worst power outage in Cuyahoga County?
The worst outage on record started August 6, 2024 (Tornado), lasting 169 hours and affecting up to 223,470 customers.