Cuyahoga CountyPower Outage History
What this grade means
Worse than average — more frequent or longer outages than most counties. This county's recorded history shows more frequent outages and/or longer restoration times than most US counties over the same 12-year period. If you live here, it's worth taking backup power more seriously than an average household would.
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 |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Cuyahoga County, Ohio that day.
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).
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 |
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 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.