– 0% of Montgomery out 0 customers out in Texas

Power outage history

Montgomery County Texas

24hours

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

27th most of 240 in Texas 3.6× the national median

Worst outage on record Hurricane Beryl · Jul 8, 2024 100% of customers out · 90% back in 6.3 days

Hours without power, average customer per year 24h / yr State average 9.0 h · national median 6.6 h

Major outages a year 1.4 Peaks over 10% of customers or 50,000 customers

Typical time to restore 90% 27hours Median across major outages, from the peak

Longest single outage 8.5days Hurricane Beryl, over 1% of customers out

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

Worst year 2024 4.2 days without power, average customer

Electricity customers 230,040 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 Montgomery'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 4.2 days for the average customer. Hatched years have a thin record and are left out of the averages.

Montgomery, hours without power per customer

MontgomeryUS median countyTexas 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
Jul 8, 2024	Hurricane Beryl	230,040	100%	8.5 d	6.3 d	20M
Feb 15, 2021	Winter storm	135,412	59%	3.6 d	27 h	4.8M
Aug 27, 2020	Hurricane Laura	115,841	50%	22 h	14 h	1.8M
May 26, 2016	Thunderstorms	31,003	13%	3.7 d	3.5 d	1.4M
Jun 21, 2023	Thunderstorms	64,824	28%	2.1 d	29 h	894k
May 28, 2024	Thunderstorms	67,271	29%	2.1 d	31 h	807k
Aug 27, 2017	Hurricane Harvey	22,109	10%	3.1 d	2.2 d	607k
May 16, 2024	No storm report	30,063	13%	2.3 d	16 h	447k
May 27, 2025	Thunderstorms	41,377	18%	21 h	17 h	429k
Sep 13, 2021	Hurricane Nicholas	28,602	12%	43 h	31 h	377k
Apr 27, 2016	Thunderstorms	26,740	12%	39 h	36 h	355k
May 2, 2024	Thunderstorms	23,250	10%	39 h	15 h	277k
May 23, 2023	Thunderstorms	14,596	6%	47 h	47 h	267k
May 30, 2024	Thunderstorms	16,695	7%	29 h	26 h	251k
May 7, 2019	No storm report	13,715	6%	24 h	21 h	229k
Sep 19, 2019	Tropical Storm Imelda	14,531	6%	29 h	20 h	218k
Apr 10, 2024	Thunderstorms	26,413	11%	15 h	9.8 h	164k
Dec 22, 2022	No storm report	8,832	4%	35 h	28 h	155k
Oct 25, 2025	Thunderstorms	21,044	9%	13 h	11 h	147k
Jun 10, 2023	No storm report	18,957	8%	18 h	22 h	143k
Jun 8, 2023	No storm report	20,039	9%	21 h	20 h	137k
Apr 9, 2020	Thunderstorms	24,034	10%	19 h	15 h	108k
Apr 27, 2015	Thunderstorms	14,413	6%	17 h	27 h	104k
Oct 25, 2022	Thunderstorms	16,858	7%	11 h	8.2 h	92k
Apr 7, 2019	Tornadoes	8,515	4%	22 h	22 h	90k
Jan 10, 2020	Thunderstorms	10,261	4%	11 h	5.0 h	86k
Mar 4, 2025	Windstorm	14,576	6%	9.8 h	3.5 h	79k
May 18, 2021	Thunderstorms	12,227	5%	14 h	14 h	79k
Nov 11, 2023	No storm report	10,055	4%	7.8 h	12 min	75k
Jun 3, 2018	No storm report	9,591	4%	13 h	14 h	74k

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

Tropical storm 62%
Winter storm 14%
No storm on record 12%
Thunderstorms 11%

Who keeps the lights on

Utilities serving Montgomery

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
Sam Houston Electric Coop Inc	Cooperative	466	347	–	14.2	88k
Mid-South Electric Coop Assn	Cooperative	189	118	2.30	15.4	37k
San Bernard Electric Coop, Inc	Cooperative	184	110	1.43	14.1	33k
CenterPoint Energy	Investor Owned	193	151	1.95	–	–

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

Waller 60 h
San Jacinto 37 h
Montgomery (this county) 24 h
Liberty 24 h
Harris 16 h
Walker 15 h
Grimes 9.4 h

Across Texas

Where it is darkest

Hours / yr64+

All Texas 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 230,040 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 →