Clark CountyPower Outage History
What this grade means
Top 20% most reliable nationally — infrequent, short outages. This county ranks in the most reliable fifth of all US counties in our dataset, based on 12 years of real DOE outage records: outages happen less often here, and when they do occur they tend to be resolved quickly compared to the rest of the country. Baseline outage risk is low, though a severe local storm can still occasionally cause a longer-than-usual outage regardless of the long-term track record.
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 |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Clark County, Washington that day.
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).
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 |
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 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.