Los Angeles CountyPower Outage History
What this grade means
Average — typical outage frequency and duration nationally. This county sits in the middle of the national distribution — its outage frequency and duration over the past 12 years are close to the nationwide median, neither notably better nor worse than most other US counties. A typical amount of backup-power preparedness is reasonable here.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jan 8, 2025 | 261 hrs | 1,717,886 (45%) | High Wind |
| Jan 7, 2025 | 18 hrs | 331,150 (9%) | High Wind |
| Nov 8, 2025 | 8 hrs | 167,769 (4%) | Unnamed event |
| Dec 13, 2020 | 11 hrs | 133,885 (4%) | Unnamed event |
| Feb 12, 2021 | 21 hrs | 114,577 (3%) | Unnamed event |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Los Angeles County, California that day.
Over the 12 years from 2014 to 2025, Los Angeles County recorded 7,454 distinct power outage events, averaging 10.8 hours per event.
The single worst outage on record in Los Angeles County started January 8, 2025 (High Wind), lasting 261 hours and leaving up to 1,717,886 customers without power (45% of the county) at its peak.
May has historically been the worst month for outages in Los Angeles County, with 832 events recorded during that month across the dataset.
Based on this history, Los Angeles County earns a Reliability Grade of C, placing it in the 42nd percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in California
Counties with the closest reliability grade and national percentile to Los Angeles County.
| County | Grade | National percentile |
|---|---|---|
| Solano County | C | 44th |
| San Bernardino County | C | 41st |
| Riverside County | C | 45th |
| Yolo County | D | 40th |
| San Luis Obispo County | C | 48th |
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 Los Angeles County?
Between 2014 and 2025, Los Angeles County recorded 7,454 outage events, averaging 10.8 hours each.
What is Los Angeles County's reliability grade?
Los Angeles County has a Reliability Grade of C, in the 42nd national percentile.
What was the worst power outage in Los Angeles County?
The worst outage on record started January 8, 2025 (High Wind), lasting 261 hours and affecting up to 1,717,886 customers.