Yuma County Power Outage History
2017–2025 · Arizona
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 |
|---|---|---|---|
| Sep 5, 2025 | 19 hrs | 19,028 (17%) | Dust Storm |
| Sep 24, 2019 | 37 hrs | 14,152 (13%) | Unnamed event |
| Aug 20, 2023 | 14 hrs | 9,794 (9%) | Tropical Storm Hilary |
| Nov 14, 2019 | 1 hrs | 7,512 (7%) | Unnamed event |
| Jun 14, 2017 | 1 hrs | 7,011 (6%) | Unnamed event |
Over the 9 years from 2017 to 2025, Yuma County recorded 468 distinct power outage events, averaging 2.7 hours per event.
The single worst outage on record in Yuma County started September 5, 2025 (Dust Storm), lasting 19 hours and leaving up to 19,028 customers without power (17% of the county) at its peak.
August has historically been the worst month for outages in Yuma County, with 65 events recorded during that month across the dataset.
Based on this history, Yuma County earns a Reliability Grade of A, placing it in the 89th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Yuma County's outage profile
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Similar counties in Arizona
Counties with the closest reliability grade and national percentile to Yuma County.
| County | Grade | National percentile |
|---|---|---|
| Greenlee County | A | 89th |
| Yavapai County | A | 88th |
| Apache County | A | 87th |
| Maricopa County | A | 86th |
| Pima County | A | 86th |
FAQ
How often does power go out in Yuma County?
Between 2017 and 2025, Yuma County recorded 468 outage events, averaging 2.7 hours each.
What is Yuma County's reliability grade?
Yuma County has a Reliability Grade of A, in the 89th national percentile.
What was the worst power outage in Yuma County?
The worst outage on record started September 5, 2025 (Dust Storm), lasting 19 hours and affecting up to 19,028 customers.