Power Out Map
– 0% of Terrebonne out 0 customers out in Louisiana

Power outage history

Terrebonne Parish Louisiana

54hours

without power for the average customer in a typical year, 2018–2025

6th most of 63 in Louisiana 8.2× the national median

Worst outage on record Hurricane Ida · Sep 4, 2021 68% of customers out · 90% back in 15.5 days
Hours without power, average customer per year 54h / yr State average 27 h · national median 6.6 h
Major outages a year 2.8 Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 3hours Median across major outages, from the peak
Longest single outage 28.1days Hurricane Ida, over 1% of customers out
Outage hours on storm days 92% Share falling on days with a NOAA storm report here
Worst year 2021 12.3 days without power, average customer
Electricity customers 40,577 ORNL customer model · 8 well-covered years

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 Terrebonne's customers who were without power at that day's worst moment.

20152016201720182019202020212022202320242025
0%100% of customers out

Year by year

Hours in the dark, per customer

2021 was the worst well-recorded year, at 12.3 days for the average customer. Hatched years have a thin record and are left out of the averages.

Terrebonne, hours without power per customer

TerrebonneUS median countyLouisiana average
0 50 100 150 3.4 ’15 3.0 ’16 6.0 ’17 5.6 ’18 27 ’19 38 ’20 296 ’21 8.0 ’22 3.0 ’23 50 ’24 2.4 ’25 LA 27 US 6.6

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 29, 2021 Hurricane Ida 27,666 68% 28.1 d 15.5 d 11M
Sep 11, 2024 Hurricane Francine 25,703 63% 5.2 d 3.6 d 1.9M
Oct 28, 2020 Hurricane Zeta 17,885 44% 10.9 d 6.4 d 1.3M
Jul 12, 2019 Hurricane Barry 25,602 63% 5.2 d 35 h 834k
May 23, 2022 No storm report 6,679 16% 13 h 9.8 h 61k
May 3, 2017 Thunderstorms 5,888 15% 27 h 12 h 55k
Oct 9, 2021 No storm report 1,522 4% 2.9 d – 44k
Nov 8, 2020 No storm report 2,972 7% 39 h 16 h 44k
Oct 12, 2021 No storm report 1,195 3% 48 h – 37k
Oct 28, 2021 No storm report 6,440 16% 26 h 30 min 37k
Dec 12, 2017 No storm report 9,725 24% 4.2 h 7.2 h 36k
Apr 28, 2020 Thunderstorms 5,863 14% 25 h 24 h 36k

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.

0% 25% 50% 75% 100% peak+24h+48h+72h+96h half back by +4h 90% by +24h

When it happens

The outage clock

Customer-hours out by month (rings, January innermost) and local hour, 2018–2025.

00061218 Jan inside

What was happening

Weather behind the outages

Each outage is matched to NOAA storm reports for Terrebonne from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.

  • Tropical storm 92%
  • No storm on record 7.6%
  • Thunderstorms 0.7%

Who keeps the lights on

Utilities serving Terrebonne

As each utility reports to the Energy Information Administration for its whole Louisiana 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 Louisiana LLC Investor Owned 253 218 1.83 11.9 962k
South Louisiana Elec Coop Assn Cooperative 176 176 2.43 12.3 17k
Terrebonne Parish Consol Gov't Municipal – – – 10.7 11k

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

Across Louisiana

Where it is darkest

Hours / yr64+

All Louisiana counties →

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 40,577 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 →