Fresno CountyPower Outage History
What this grade means
Better than average — fewer or shorter outages than most counties. This county's outage history is better than the national median: recorded outages are less frequent and/or shorter in duration than a typical US county experienced over the same 12-year period. It isn't in the top tier nationally, but its track record points to lower-than-average outage risk.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Mar 16, 2020 | 1 hrs | 69,680 (15%) | Unnamed event |
| Jun 5, 2019 | 3 hrs | 22,318 (5%) | Flood |
| Feb 21, 2023 | 42 hrs | 19,144 (4%) | Frost/Freeze |
| Nov 8, 2022 | 7 hrs | 18,807 (4%) | Drought |
| Dec 8, 2019 | <1 hr | 18,139 (4%) | Heavy Rain |
Was There an Outage on a Specific Date?
Pick a date to see whether a power outage was recorded for Fresno County, California that day.
Over the 12 years from 2014 to 2025, Fresno County recorded 3,947 distinct power outage events, averaging 3.4 hours per event.
The single worst outage on record in Fresno County started March 16, 2020, lasting 1 hours and leaving up to 69,680 customers without power (15% of the county) at its peak.
August has historically been the worst month for outages in Fresno County, with 404 events recorded during that month across the dataset.
Based on this history, Fresno County earns a Reliability Grade of B, placing it in the 71st percentile nationally for grid reliability (higher percentile = more reliable).
Similar counties in California
Counties with the closest reliability grade and national percentile to Fresno County.
| County | Grade | National percentile |
|---|---|---|
| Merced County | B | 70th |
| San Francisco County | B | 73rd |
| Alameda County | B | 68th |
| Imperial County | B | 75th |
| Modoc County | B | 75th |
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 Fresno County?
Between 2014 and 2025, Fresno County recorded 3,947 outage events, averaging 3.4 hours each.
What is Fresno County's reliability grade?
Fresno County has a Reliability Grade of B, in the 71st national percentile.
What was the worst power outage in Fresno County?
The worst outage on record started March 16, 2020, lasting 1 hours and affecting up to 69,680 customers.