– 0% of Cumberland out 0 customers out in Maine

Power outage history

Cumberland County Maine

12hours

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

15th most of 16 in Maine 1.8× the national median

Worst outage on record Oct 30, 2017 48% of customers out · 90% back in 30 min

Hours without power, average customer per year 12h / yr State average 21 h · national median 6.6 h

Major outages a year 1.0 Peaks over 10% of customers or 50,000 customers

Typical time to restore 90% 28hours Median across major outages, from the peak

Longest single outage 6.8days Oct 29, 2017, over 1% of customers out

Outage hours on storm days 88% Share falling on days with a NOAA storm report here

Worst year 2024 37 hours without power, average customer

Electricity customers 227,401 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 Cumberland'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

2024 was the worst well-recorded year, at 37 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Cumberland, hours without power per customer

CumberlandUS median countyMaine average

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
Oct 29, 2017	Windstorm	109,526	48%	6.8 d	30 min	5.7M
Apr 4, 2024	Winter storm	105,529	46%	4.2 d	2.9 d	4.3M
Mar 23, 2024	Winter storm	89,045	39%	3.2 d	36 h	3.1M
Dec 18, 2023	Windstorm	71,717	32%	3.5 d	3.0 d	2.5M
Dec 23, 2022	Windstorm	60,853	27%	3.3 d	47 h	1.9M
Dec 5, 2020	Winter storm	43,564	19%	2.8 d	47 h	1.2M
Nov 30, 2020	Windstorm	32,078	14%	30 h	20 h	520k
Aug 4, 2020	Hurricane Isaias	27,863	12%	25 h	21 h	441k
Dec 17, 2022	Winter storm	10,844	5%	2.7 d	2.5 d	433k
Apr 9, 2020	Winter storm	18,500	8%	43 h	38 h	407k
Dec 29, 2016	Winter storm	28,105	12%	23 h	9.2 h	387k
Feb 15, 2017	Winter storm	10,836	5%	38 h	22 h	210k
Mar 14, 2023	Winter storm	24,467	11%	23 h	19 h	209k
May 1, 2023	No storm report	16,820	7%	17 h	15 h	152k
Dec 19, 2025	No storm report	13,122	6%	22 h	19 h	135k
Sep 6, 2018	Thunderstorms	12,717	6%	23 h	26 h	134k
Nov 27, 2018	Flooding	9,088	4%	30 h	27 h	124k
Mar 23, 2020	Winter storm	15,819	7%	14 h	8.5 h	110k
Dec 24, 2025	Winter storm	10,955	5%	16 h	14 h	109k
Oct 14, 2022	Windstorm	16,789	7%	13 h	16 h	108k
Oct 16, 2018	No storm report	15,315	7%	11 h	11 h	106k
Nov 30, 2022	Thunderstorms	10,075	4%	19 h	18 h	97k
Nov 16, 2020	No storm report	9,741	4%	15 h	12 h	95k
Feb 7, 2020	No storm report	13,350	6%	21 h	18 h	84k
Sep 30, 2020	No storm report	13,447	6%	13 h	21 h	84k
Jun 23, 2024	No storm report	9,256	4%	10 h	11 h	83k
Jul 22, 2016	Thunderstorms	14,976	7%	14 h	12 h	78k
Jan 10, 2024	Winter storm	9,070	4%	8.2 h	7.8 h	65k
Apr 19, 2022	No storm report	11,580	5%	11 h	8.8 h	65k
Jun 20, 2024	Thunderstorms	9,142	4%	9.5 h	6.0 h	63k

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

Winter storm 54%
Windstorm 27%
No storm on record 12%
Tropical storm 2.9%
Thunderstorms 2.5%
Flooding 1.1%

Who keeps the lights on

Utilities serving Cumberland

As each utility reports to the Energy Information Administration for its whole Maine territory, not this county alone. Outage minutes include major storm days.

Utility	Type	Outage min / yr	Excl. major storms	Outages / yr	Residential ¢/kWh	Customers
Central Maine Power Co	Investor Owned	318	177	2.11	27.4	584k

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

Oxford 32 h
York 30 h
Sagadahoc 26 h
Androscoggin 13 h
Cumberland (this county) 12 h

Across Maine

Where it is darkest

Hours / yr64+

All Maine 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 227,401 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 →