Power outage history
Jefferson County Texas
18hours
without power for the average customer in a typical year, 2018–2025
48th most of 240 in Texas 2.8× the national median
Every day since 2015
Eleven years, one night at a time
Each cell is a day. The brighter it is, the larger the share of Jefferson's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2020 was the worst well-recorded year, at 3.5 days for the average customer. Hatched years have a thin record and are left out of the averages.
Jefferson, hours without power per customer
The record
The biggest outages since 2015
Ranked by customer-hours lost: customers out multiplied by how long they stayed out. Times are local.
| Began | Storm | Peak out | Share | Lasted | 90% restored | Customer-hours |
|---|---|---|---|---|---|---|
| Aug 26, 2020 | Hurricane Laura | 90,667 | 76% | 6.7 d | 4.2 d | 5.3M |
| Oct 9, 2020 | Hurricane Delta | 75,222 | 63% | 5.2 d | 3.9 d | 4.0M |
| Aug 29, 2017 | Hurricane Harvey | 20,255 | 17% | 10.6 d | 8.3 d | 2.0M |
| May 10, 2019 | Thunderstorms | 40,256 | 34% | 3.7 d | 2.6 d | 1.3M |
| Jul 8, 2024 | Hurricane Beryl | 22,497 | 19% | 2.4 d | 40 h | 478k |
| Feb 16, 2021 | No storm report | 32,400 | 27% | 33 h | 14 h | 411k |
| Jun 10, 2023 | No storm report | 12,541 | 11% | 40 h | 37 h | 210k |
| May 28, 2024 | Thunderstorms | 16,536 | 14% | 28 h | 24 h | 189k |
| Sep 19, 2019 | Tropical Storm Imelda | 8,685 | 7% | 40 h | 44 h | 176k |
| May 2, 2024 | Flooding | 14,272 | 12% | 31 h | 13 h | 117k |
| Oct 27, 2021 | Tornadoes | 13,668 | 11% | 37 h | 15 h | 116k |
| Aug 5, 2020 | Thunderstorms | 8,895 | 7% | 24 h | 21 h | 84k |
| Apr 29, 2020 | No storm report | 12,399 | 10% | 13 h | 10 h | 83k |
| May 28, 2016 | No storm report | 5,736 | 5% | 19 h | 9.2 h | 81k |
| Aug 27, 2017 | Hurricane Harvey | 5,931 | 5% | 25 h | 14 h | 75k |
| May 27, 2025 | No storm report | 7,687 | 6% | 17 h | 16 h | 72k |
| Oct 25, 2022 | No storm report | 7,729 | 6% | 14 h | 13 h | 52k |
| Aug 11, 2015 | No storm report | 6,259 | 5% | 19 h | 18 h | 43k |
| Apr 10, 2024 | Tornadoes | 4,320 | 4% | 17 h | – | 42k |
| May 19, 2021 | No storm report | 5,222 | 4% | 13 h | 13 h | 41k |
| Sep 14, 2021 | Hurricane Nicholas | 3,349 | 3% | 17 h | – | 39k |
| Apr 27, 2016 | Thunderstorms | 11,409 | 10% | 6.8 h | 5.8 h | 35k |
| Jan 24, 2023 | Thunderstorms | 9,151 | 8% | 10 h | 16 h | 33k |
| Oct 31, 2018 | No storm report | 4,498 | 4% | 13 h | – | 33k |
| Dec 26, 2022 | No storm report | 5,206 | 4% | 7.2 h | 4.8 h | 31k |
| Sep 8, 2023 | Thunderstorms | 5,972 | 5% | 8.2 h | 7.8 h | 29k |
| Oct 25, 2025 | No storm report | 4,831 | 4% | 10 h | – | 28k |
| May 27, 2021 | No storm report | 5,176 | 4% | 5.8 h | 3.8 h | 28k |
| Apr 14, 2018 | Thunderstorms | 6,279 | 5% | 5.5 h | 6.8 h | 27k |
| Apr 15, 2023 | Thunderstorms | 4,173 | 3% | 14 h | – | 27k |
After the peak
How fast the lights come back
Each line is one major outage, from its peak. The amber line is the typical path.
When it happens
The outage clock
Customer-hours out by month (rings, January innermost) and local hour, 2018–2025.
What was happening
Weather behind the outages
Each outage is matched to NOAA storm reports for Jefferson from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Tropical storm 70%
- No storm on record 15%
- Thunderstorms 12%
- Tornadoes 1.4%
- Flooding 1.1%
Who keeps the lights on
Utilities serving Jefferson
As each utility reports to the Energy Information Administration for its whole Texas territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| Entergy Texas Inc. | Investor Owned | 403 | 305 | 2.58 | 13.9 | 469k |
EIA Form 861, latest year each utility reported. Outage minutes are SAIDI, the yearly minutes the average customer goes without power; outages a year are SAIFI.
Next door
Neighbouring counties
- Cameron, LA 60 h
- Chambers 36 h
- Liberty 24 h
- Orange 23 h
- Jefferson (this county) 18 h
- Hardin 11 h
About these numbers
Notes
Outages come from the EAGLE-I record of utility outage maps collected every 15 minutes by Oak Ridge National Laboratory. Hours without power are customer-hours divided by the county's 119,476 electricity customers. Averages use well-covered years from 2018. Outages shorter than 15 minutes, and utilities that publish no outage map, are not in the record, so these figures understate the total. How every number is made →