Hawaii County Power Outage History
2021–2025 · Hawaii
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 |
|---|---|---|---|
| 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 |
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).
Sized for Hawaii County's outage profile
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Outage-prep kit
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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 |
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.