Clark County Power Outage History
2017–2025 · Washington
Top 20% most reliable nationally — infrequent, short outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Dec 17, 2025 | 60 hrs | 94,192 (41%) | Unnamed event |
| Jan 10, 2023 | 13 hrs | 33,777 (15%) | Unnamed event |
| Dec 27, 2022 | 35 hrs | 31,966 (14%) | Unnamed event |
| Feb 13, 2021 | 13 hrs | 28,581 (12%) | Unnamed event |
| Jul 25, 2023 | 2 hrs | 27,515 (12%) | Unnamed event |
Over the 9 years from 2017 to 2025, Clark County recorded 725 distinct power outage events, averaging 2.2 hours per event.
The single worst outage on record in Clark County started December 17, 2025, lasting 60 hours and leaving up to 94,192 customers without power (41% of the county) at its peak.
December has historically been the worst month for outages in Clark County, with 86 events recorded during that month across the dataset.
Based on this history, Clark County earns a Reliability Grade of A, placing it in the 85th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Clark County's outage profile
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Similar counties in Washington
Counties with the closest reliability grade and national percentile to Clark County.
| County | Grade | National percentile |
|---|---|---|
| Asotin County | A | 84th |
| Chelan County | A | 83rd |
| Douglas County | A | 82nd |
| Yakima County | B | 80th |
| Adams County | A | 91st |
FAQ
How often does power go out in Clark County?
Between 2017 and 2025, Clark County recorded 725 outage events, averaging 2.2 hours each.
What is Clark County's reliability grade?
Clark County has a Reliability Grade of A, in the 85th national percentile.
What was the worst power outage in Clark County?
The worst outage on record started December 17, 2025, lasting 60 hours and affecting up to 94,192 customers.