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

Power outage history

Perry County Illinois

5.6hours

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

35th most of 101 in Illinois 15% below the national median

Worst outage on record Mar 15, 2025 43% of customers out · 90% back in 20 hours
Hours without power, average customer per year 5.6h / yr State average 2.9 h · national median 6.6 h
Major outages a year 2.0 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 48hours Jun 28, 2018, over 1% of customers out
Outage hours on storm days 77% Share falling on days with a NOAA storm report here
Worst year 2025 13 hours without power, average customer
Electricity customers 11,975 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 Perry'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

2025 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.

Perry, hours without power per customer

PerryUS median countyIllinois average
0 5 10 15 2.7 ’15 4.7 ’16 1.4 ’17 6.7 ’18 1.8 ’19 3.1 ’20 4.5 ’21 2.2 ’22 9.5 ’23 3.6 ’24 13 ’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
Mar 14, 2025 Tornadoes 5,170 43% 45 h 20 h 105k
Jul 29, 2023 Thunderstorms 6,266 52% 45 h 25 h 65k
Jun 28, 2018 Thunderstorms 1,951 16% 48 h 43 h 34k
Aug 12, 2021 Thunderstorms 2,568 21% 21 h 19 h 30k
Jul 13, 2016 Thunderstorms 2,226 19% 28 h 17 h 29k
May 31, 2018 Tropical Storm Alberto 4,349 36% 19 h 13 h 24k
Aug 10, 2020 Thunderstorms 1,833 15% 46 h 20 h 16k
Oct 19, 2025 Thunderstorms 2,582 22% 19 h 13 h 16k
Feb 24, 2016 Winter storm 2,806 23% 14 h 8.2 h 14k
Mar 3, 2023 Windstorm 4,570 38% 12 h 1.5 h 13k
Aug 13, 2019 Thunderstorms 709 6% 11 h 7.5 h 7.1k
Apr 30, 2017 Flooding 1,051 9% 6.8 h 6.8 h 7.1k

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 +6h 90% by +14h

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

  • Thunderstorms 40%
  • Tornadoes 24%
  • No storm on record 24%
  • Windstorm 5.4%
  • Tropical storm 5.3%
  • Winter storm 1.6%
  • Heat 0.5%

Who keeps the lights on

Utilities serving Perry

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
Tri-County Electric Coop, Inc (IL) Cooperative 132 63 1.64 16.2 16k
Egyptian Electric Coop Assn Cooperative 773 24 4.62 16.2 14k

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 11,975 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 →