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

Power outage history

Iroquois County Illinois

4.2hours

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

54th most of 101 in Illinois 36% below the national median

Worst outage on record May 23, 2019 55% of customers out · 90% back in 16 hours
Hours without power, average customer per year 4.2h / yr State average 2.9 h · national median 6.6 h
Major outages a year 3.1 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 2.0days Jun 29, 2023, over 1% of customers out
Outage hours on storm days 58% Share falling on days with a NOAA storm report here
Worst year 2019 8.1 hours without power, average customer
Electricity customers 10,038 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 Iroquois'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 8.1 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Iroquois, hours without power per customer

IroquoisUS median countyIllinois average
0 2 4 6 8 10 1.4 ’15 3.4 ’16 0.5 ’17 2.7 ’18 8.1 ’19 4.0 ’20 4.5 ’21 2.2 ’22 2.7 ’23 5.2 ’24 4.0 ’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
May 23, 2019 Thunderstorms 5,566 55% 27 h 16 h 51k
Aug 10, 2020 Thunderstorms 3,751 37% 24 h 14 h 23k
May 21, 2024 Windstorm 3,462 34% 15 h 10 h 15k
Jul 28, 2025 No storm report 3,394 34% 9.5 h 6.8 h 9.7k
Jun 29, 2023 Thunderstorms 436 4% 2.0 d – 9.3k
Jun 22, 2016 Tornadoes 2,075 21% 9.0 h 3.2 h 7.5k
Jul 4, 2022 Thunderstorms 678 7% 21 h 21 h 6.3k
Mar 28, 2021 No storm report 2,606 26% 3.8 h 2.2 h 6.0k
Feb 24, 2016 No storm report 825 8% 13 h 7.5 h 5.4k
Dec 4, 2024 No storm report 3,388 34% 2.2 h 1.5 h 5.3k
Jan 1, 2021 Ice storm 1,862 19% 11 h 9.8 h 4.5k
Jun 19, 2021 No storm report 2,337 23% 7.2 h 1.5 h 3.9k

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 +2h 90% by +8h

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

  • Thunderstorms 43%
  • No storm on record 42%
  • Windstorm 7.1%
  • Winter storm 2.3%
  • Flooding 1.9%
  • Ice storm 1.8%
  • Tornadoes 1.1%
  • Tropical storm 0.7%

Who keeps the lights on

Utilities serving Iroquois

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
Eastern Illinois Elec Coop Cooperative 223 157 2.22 17.7 11k

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 10,038 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 →