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

Power outage history

Assumption Parish Louisiana

53hours

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

8th most of 63 in Louisiana 8.0× the national median

Worst outage on record Hurricane Ida · Aug 29, 2021 100% of customers out · 90% back in 12.6 days
Hours without power, average customer per year 53h / yr State average 27 h · national median 6.6 h
Major outages a year 11.8 Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 2hours Median across major outages, from the peak
Longest single outage 15.1days Hurricane Ida, over 1% of customers out
Outage hours on storm days 83% Share falling on days with a NOAA storm report here
Worst year 2021 9.9 days without power, average customer
Electricity customers 6,738 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 Assumption'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 9.9 days for the average customer. Hatched years have a thin record and are left out of the averages.

Assumption, hours without power per customer

AssumptionUS median countyLouisiana average
0 50 100 150 200 39 ’15 28 ’16 15 ’17 8.4 ’18 54 ’19 23 ’20 237 ’21 12 ’22 11 ’23 65 ’24 9.7 ’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 6,738 100% 15.1 d 12.6 d 1.5M
Sep 11, 2024 Hurricane Francine 6,738 100% 5.0 d 3.0 d 381k
Jul 12, 2019 Hurricane Barry 6,738 100% 4.1 d 2.2 d 317k
Apr 27, 2015 Tornadoes 6,738 100% 5.1 d 2.9 d 228k
May 19, 2016 Thunderstorms 3,919 58% 2.8 d 43 h 77k
Feb 23, 2016 Tornadoes 6,738 100% 2.2 d 22 h 61k
Oct 9, 2020 Hurricane Delta 2,471 37% 29 h 11 h 38k
Dec 1, 2020 No storm report 3,403 51% 13 h 10 h 35k
Jun 20, 2023 Thunderstorms 4,510 67% 31 h 24 h 34k
Aug 30, 2017 Hurricane Harvey 3,383 50% 5.8 h 5.8 h 19k
Mar 22, 2021 No storm report 2,221 33% 8.2 h 12 h 18k
Nov 14, 2022 No storm report 6,738 100% 3.0 h 1.2 h 17k

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 +8h 90% by +22h

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 Assumption from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.

  • Tropical storm 81%
  • No storm on record 17%
  • Thunderstorms 1.3%

Who keeps the lights on

Utilities serving Assumption

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
Cleco Power LLC Investor Owned 212 146 2.26 14.3 253k
South Louisiana Elec Coop Assn Cooperative 176 176 2.43 12.3 17k

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 6,738 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 →