Hawaii 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 |
|---|---|---|---|
| Jan 31, 2025 | 12 hrs | 36,430 (21%) | Unnamed event |
| Aug 24, 2024 | 76 hrs | 24,469 (14%) | Hurricane Hone |
| Dec 5, 2021 | 14 hrs | 21,327 (12%) | Drought |
| Jan 30, 2024 | 3 hrs | 17,171 (10%) | Unnamed event |
| May 2, 2025 | 8 hrs | 14,550 (8%) | Drought |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Hawaii County, Hawaii that day.
Over the 5 years from 2021 to 2025, Hawaii County recorded 539 distinct power outage events, averaging 3.7 hours per event.
The single worst outage on record in Hawaii County started January 31, 2025, lasting 12 hours and leaving up to 36,430 customers without power (21% of the county) at its peak.
November has historically been the worst month for outages in Hawaii County, with 58 events recorded during that month across the dataset.
Based on this history, Hawaii County earns a Reliability Grade of A, placing it in the 82nd percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in Hawaii
Counties with the closest reliability grade and national percentile to Hawaii County.
| County | Grade | National percentile |
|---|---|---|
| Honolulu County | B | 64th |
| Kauai County | C | 59th |
| Maui County | C | 57th |
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 Hawaii County?
Between 2021 and 2025, Hawaii County recorded 539 outage events, averaging 3.7 hours each.
What is Hawaii County's reliability grade?
Hawaii County has a Reliability Grade of A, in the 82nd national percentile.
What was the worst power outage in Hawaii County?
The worst outage on record started January 31, 2025, lasting 12 hours and affecting up to 36,430 customers.