Power outage history
Prince George's County Maryland
3.2hours
without power for the average customer in a typical year, 2018–2025
12th most of 24 in Maryland 51% below 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 Prince George's's customers who were without power at that day's worst moment.
Year by year
Hours in the dark, per customer
2018 was the worst well-recorded year, at 6.8 hours for the average customer. Hatched years have a thin record and are left out of the averages.
Prince George's, 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 |
|---|---|---|---|---|---|---|
| Mar 2, 2018 | Windstorm | 85,071 | 24% | 2.6 d | 25 h | 1.8M |
| Jul 12, 2022 | Thunderstorms | 64,522 | 18% | 2.2 d | 32 h | 907k |
| Jun 19, 2025 | Thunderstorms | 29,631 | 8% | 18 h | 18 h | 208k |
| Jan 3, 2022 | Winter storm | 19,563 | 6% | 17 h | 25 h | 199k |
| Jul 1, 2021 | Thunderstorms | 21,198 | 6% | 21 h | 23 h | 158k |
| May 16, 2025 | Thunderstorms | 27,694 | 8% | 13 h | 10 h | 158k |
| Jul 18, 2023 | No storm report | 15,927 | 5% | 13 h | 19 h | 134k |
| Feb 16, 2025 | Windstorm | 10,139 | 3% | 20 h | 20 h | 131k |
| Jul 31, 2024 | Thunderstorms | 18,714 | 5% | 10 h | 9.8 h | 114k |
| Jul 29, 2023 | Thunderstorms | 9,883 | 3% | 16 h | 27 h | 105k |
| Jul 1, 2015 | Thunderstorms | 13,355 | 4% | 9.0 h | 10 h | 78k |
| May 2, 2016 | Thunderstorms | 9,076 | 3% | 7.8 h | 9.0 h | 51k |
| Jul 6, 2020 | Thunderstorms | 12,237 | 4% | 6.0 h | 13 h | 43k |
| Jul 7, 2021 | No storm report | 5,001 | 1% | 10 h | 10 h | 39k |
| Jul 3, 2022 | Flooding | 7,112 | 2% | 5.5 h | 7.2 h | 34k |
| May 16, 2022 | Thunderstorms | 14,143 | 4% | 3.2 h | 3.5 h | 31k |
| Aug 17, 2016 | Thunderstorms | 11,126 | 3% | 4.0 h | 6.0 h | 30k |
| Jul 22, 2020 | Thunderstorms | 7,881 | 2% | 5.2 h | 7.2 h | 29k |
| Jul 17, 2019 | Thunderstorms | 7,907 | 2% | 5.0 h | 8.5 h | 27k |
| Jun 20, 2015 | Flooding | 6,502 | 2% | 5.2 h | 11 h | 26k |
| Jul 14, 2023 | Thunderstorms | 10,924 | 3% | 3.8 h | 7.2 h | 26k |
| Dec 23, 2022 | Winter storm | 9,320 | 3% | 5.2 h | 14 h | 24k |
| Mar 14, 2017 | Winter storm | 7,000 | 2% | 4.5 h | 5.2 h | 24k |
| Feb 28, 2016 | No storm report | 10,573 | 3% | 3.2 h | 4.2 h | 22k |
| Jun 21, 2016 | Thunderstorms | 6,884 | 2% | 4.0 h | 5.8 h | 20k |
| Jul 27, 2025 | Thunderstorms | 4,332 | 1% | 4.5 h | – | 19k |
| May 23, 2019 | Thunderstorms | 8,090 | 2% | 3.0 h | 6.2 h | 19k |
| Mar 1, 2017 | Thunderstorms | 8,499 | 2% | 2.8 h | 3.8 h | 18k |
| Apr 1, 2023 | Windstorm | 4,915 | 1% | 4.5 h | – | 18k |
| May 26, 2021 | Thunderstorms | 6,393 | 2% | 3.2 h | 5.0 h | 18k |
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 Prince George's from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.
- Windstorm 44%
- Thunderstorms 42%
- No storm on record 7.0%
- Winter storm 5.0%
- Flooding 1.5%
Who keeps the lights on
Utilities serving Prince George's
As each utility reports to the Energy Information Administration for its whole Maryland territory, not this county alone. Outage minutes include major storm days.
| Utility | Type | Outage min / yr | Excl. major storms | Outages / yr | Residential ¢/kWh | Customers |
|---|---|---|---|---|---|---|
| Baltimore Gas & Electric Co | Investor Owned | 175 | 65 | 0.87 | 20.2 | 1.2M |
| Potomac Electric Power Co | Investor Owned | 104 | 54 | 0.74 | 21.7 | 559k |
| Southern Maryland Elec Coop Inc | Cooperative | 173 | 118 | 1.56 | 16.4 | 163k |
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
- Alexandria, VA 4.9 h
- Calvert 4.8 h
- Charles 4.3 h
- Fairfax, VA 3.5 h
- Prince George's (this county) 3.2 h
- Anne Arundel 3.1 h
- Montgomery 2.8 h
- Howard 2.3 h
- District of Columbia, DC 2.1 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 349,773 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 →