Power Out Map
– 0% of Warren out 0 customers out in Illinois

Power outage history

Warren County Illinois

5.4hours

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

37th most of 101 in Illinois 18% below the national median

Worst outage on record Dec 29, 2015 44% of customers out · 90% back in 30 min
Hours without power, average customer per year 5.4h / yr State average 2.9 h · national median 6.6 h
Major outages a year 4.4 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 4.1days Jun 29, 2023, over 1% of customers out
Outage hours on storm days 29% Share falling on days with a NOAA storm report here
Worst year 2023 13 hours without power, average customer
Electricity customers 8,244 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 Warren'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

2023 was the worst well-recorded year, at 13 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Warren, hours without power per customer

WarrenUS median countyIllinois average
0 5 10 15 20 16 ’15 6.5 ’16 0.9 ’17 2.3 ’18 8.7 ’19 3.1 ’20 5.0 ’21 1.6 ’22 13 ’23 6.1 ’24 3.5 ’25 US 6.6 IL 2.9

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
Dec 28, 2015 Ice storm 3,590 44% 2.4 d 30 min 52k
Jun 29, 2023 Thunderstorms 1,055 13% 4.1 d 3.7 d 49k
Jun 22, 2016 Thunderstorms 3,580 43% 23 h 19 h 27k
Jul 16, 2015 Tornadoes 3,892 47% 27 h 4.8 h 19k
Dec 4, 2023 No storm report 4,980 60% 3.5 h 3.2 h 16k
Jul 15, 2024 No storm report 1,507 18% 44 h 17 h 13k
Dec 3, 2023 No storm report 5,611 68% 2.8 h 2.0 h 13k
Nov 21, 2015 No storm report 1,208 15% 19 h 12 h 13k
Nov 11, 2015 Thunderstorms 826 10% 23 h 19 h 12k
Oct 22, 2015 No storm report 6,801 83% 2.2 h 2.2 h 12k
Apr 9, 2024 No storm report 1,361 17% 16 h 21 h 11k
Jun 30, 2019 Thunderstorms 1,486 18% 15 h 6.8 h 11k

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

  • No storm on record 71%
  • Thunderstorms 27%
  • Winter storm 1.0%
  • Tornadoes 0.9%

Who keeps the lights on

Utilities serving Warren

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

Utility Type Outage min / yr Excl. major storms Outages / yr Residential ¢/kWh Customers
Ameren Illinois Company Investor Owned 287 130 1.19 16.7 1.1M
McDonough Power Coop IL – – – – 55k

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 Illinois

Where it is darkest

Hours / yr64+

All Illinois 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 8,244 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 →