Power Out Map
– 0% of Delaware out 0 customers out in Oklahoma

Power outage history

Delaware County Oklahoma

8.1hours

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

30th most of 75 in Oklahoma 1.2× the national median

Worst outage on record Jun 18, 2023 61% of customers out · 90% back in 23 hours
Hours without power, average customer per year 8.1h / yr State average 8.3 h · national median 6.6 h
Major outages a year 3.0 Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 4hours Median across major outages, from the peak
Longest single outage 2.9days Aug 26, 2019, over 1% of customers out
Outage hours on storm days 59% Share falling on days with a NOAA storm report here
Worst year 2019 17 hours without power, average customer
Electricity customers 23,694 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 Delaware'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

2019 was the worst well-recorded year, at 17 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Delaware, hours without power per customer

DelawareUS median countyOklahoma average
0 5 10 15 20 8.4 ’15 10 ’16 14 ’17 5.6 ’18 17 ’19 3.9 ’20 5.6 ’21 4.3 ’22 17 ’23 5.3 ’24 5.3 ’25 OK 8.3 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
Jun 18, 2023 Thunderstorms 14,471 61% 2.8 d 23 h 253k
Aug 26, 2019 Thunderstorms 6,864 29% 2.9 d 46 h 149k
May 22, 2019 Tornadoes 5,059 21% 23 h 9.0 h 70k
Sep 5, 2023 Thunderstorms 7,397 31% 17 h 14 h 46k
May 20, 2019 Thunderstorms 2,704 11% 2.0 d 7.2 h 45k
May 19, 2017 No storm report 6,174 26% 26 h 15 h 38k
Apr 29, 2017 Flooding 5,392 23% 38 h 20 h 38k
Feb 16, 2021 No storm report 5,073 21% 10 h 6.0 h 31k
Apr 27, 2016 Thunderstorms 4,180 18% 13 h 9.2 h 27k
Oct 4, 2015 No storm report 4,006 17% 16 h 23 h 26k
May 26, 2024 Tornadoes 1,481 6% 38 h 40 h 25k
Feb 14, 2016 No storm report 1,438 6% 15 h 16 h 22k

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 +16h

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

  • Thunderstorms 45%
  • No storm on record 41%
  • Tornadoes 12%
  • Heat 0.7%
  • Flooding 0.7%
  • Wildfire 0.6%

Who keeps the lights on

Utilities serving Delaware

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

Utility Type Outage min / yr Excl. major storms Outages / yr Residential ¢/kWh Customers
Public Service Co of Oklahoma Investor Owned 200 98 1.48 14.2 506k
Northeast Oklahoma Electric Co Cooperative – – – 13.8 38k
Lake Region Electric Coop, Inc Cooperative 317 108 1.50 13.0 25k
Ozarks Electric Coop Corp Cooperative 1,043 132 2.71 14.9 12k
Empire District Electric Co Investor Owned 200 102 2.25 14.9 4.0k

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 Oklahoma

Where it is darkest

Hours / yr64+

All Oklahoma 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 23,694 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 →