Ascension Parish Power Outage History
2014–2025 · Louisiana
Bottom 20% least reliable nationally — frequent and/or long outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 29, 2021 | 19 hrs | 54,507 (90%) | Unnamed event |
| Aug 30, 2021 | 405 hrs | 51,521 (85%) | Unnamed event |
| Sep 11, 2024 | 87 hrs | 42,788 (70%) | Hurricane Francine |
| Aug 29, 2021 | 7 hrs | 21,099 (35%) | Unnamed event |
| Apr 27, 2015 | 3 hrs | 18,441 (30%) | Thunderstorm Wind |
Over the 12 years from 2014 to 2025, Ascension Parish recorded 1,483 distinct power outage events, averaging 2.8 hours per event.
The single worst outage on record in Ascension Parish started August 29, 2021, lasting 19 hours and leaving up to 54,507 customers without power (90% of the county) at its peak.
July has historically been the worst month for outages in Ascension Parish, with 194 events recorded during that month across the dataset.
Based on this history, Ascension Parish earns a Reliability Grade of F, placing it in the 2nd percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Ascension Parish's outage profile
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Similar counties in Louisiana
Counties with the closest reliability grade and national percentile to Ascension Parish.
| County | Grade | National percentile |
|---|---|---|
| Vernon Parish | F | 2nd |
| Union Parish | F | 3rd |
| Assumption Parish | F | 3rd |
| Livingston Parish | F | 2nd |
| St. Bernard Parish | F | 3rd |
FAQ
How often does power go out in Ascension Parish?
Between 2014 and 2025, Ascension Parish recorded 1,483 outage events, averaging 2.8 hours each.
What is Ascension Parish's reliability grade?
Ascension Parish has a Reliability Grade of F, in the 2nd national percentile.
What was the worst power outage in Ascension Parish?
The worst outage on record started August 29, 2021, lasting 19 hours and affecting up to 54,507 customers.