Illinois major outage reports
Illinois is named in 48 DOE reports for 2014 to 2023, and Illinois ranks 28th of 51 by count and 46th per resident. Illinois runs below the U.S. average, at 3.8 per million people. Illinois peaked in 2023 with 10; severe weather and natural disasters lead with 48% of Illinois's reports. The largest customer count in an Illinois-only report is 856,000, dated 10 Aug 2020. Treat 48 as DOE-threshold filings, not every Illinois outage.
Illinois reports by year
Illinois filed 14 in 2014 to 2018 and 34 in 2019 to 2023, a rise of 143%, with 21% of the Illinois total landing in 2023.
Illinois reports a year
- 6'14
- 1'15
- 0'16
- 1'17
- 6'18
- 5'19
- 7'20
- 7'21
- 5'22
- 10'23
What Illinois reports are about
| Cause | Reports | Share |
|---|---|---|
| Severe weather and natural disasters | 23 | 48% |
| Equipment failures and system operations | 12 | 25% |
| Physical attacks, vandalism and suspicious activity | 8 | 17% |
| Fuel supply problems | 2 | 4% |
| Cyber events | 2 | 4% |
| All other groups | 1 | 2% |
| Type | Reports | Share |
|---|---|---|
| Severe Weather | 16 | 33% |
| System Operations | 8 | 17% |
| Suspicious Activity | 5 | 10% |
| Transmission Interruption | 3 | 6% |
| Suspicious activity | 3 | 6% |
| Fuel Supply Emergency - Natural Gas | 2 | 4% |
14 of the 48 Illinois reports also name another state, while 34 name Illinois alone.
Largest Illinois reports by customers affected
12 of 34 reports naming only Illinois list customers, and 11 list 50,000 or more. Tables on this page show those Illinois-only reports.
| Began | Area | Type | Customers | Length | MW |
|---|---|---|---|---|---|
| 10 Aug 2020 | Illinois: Cook County, Will County, DuPage County, Lake County, Kane County and more | Severe Weather | 856,000 | — | — |
| 30 Jun 2014 | Illinois | Severe Weather - Thunderstorms | 420,000 | 46.5 h | — |
| 10 Aug 2021 | Illinois | Severe Weather | 318,761 | 22.5 h | — |
| 25 Nov 2018 | Illinois: Will County, DuPage County, Kane County, McHenry County and more | Severe Weather | 313,448 | 2.9 days | — |
| 5 Sep 2014 | Illinois | Severe Weather - Thunderstorms | 180,400 | 21.5 h | — |
| 28 Jul 2023 | Illinois: Winnebago County, Cook County, Will County, DeKalb County, Kendall County | Weather or natural disaster | 122,921 | 37.0 h | — |
| 30 Jul 2023 | Illinois: Winnebago County, Cook County, Will County, DeKalb County, Kendall County | Weather or natural disaster | 122,921 | — | — |
| 3 Aug 2015 | Illinois | Severe Weather | 115,000 | 1.5 h | — |
| 29 Aug 2018 | Illinois | Severe Weather | 100,000 | 24.0 h | — |
| 30 Jun 2019 | Illinois: Cook County, DeKalb County, DuPage County, Grundy County and more | Severe Weather | 100,000 | 5.0 h | — |
Longest Illinois reports
| Began | Area | Type | Customers | Length | MW |
|---|---|---|---|---|---|
| 11 Feb 2021 | Illinois: Scott County | Fuel Supply Deficiency | — | 11.0 days | — |
| 17 Jan 2014 | Illinois | Fuel Supply Emergency - Natural Gas | — | 10.9 days | — |
| 30 Jan 2019 | Illinois: Scott County | Fuel Supply Deficiency | — | 3.2 days | — |
| 25 Nov 2018 | Illinois: Will County, DuPage County, Kane County, McHenry County and more | Severe Weather | 313,448 | 2.9 days | — |
| 30 Jun 2014 | Illinois | Severe Weather - Thunderstorms | 420,000 | 46.5 h | — |
Latest Illinois reports on file
| Began | Area | Type | Customers | Length | MW |
|---|---|---|---|---|---|
| 19 Nov 2023 | Illinois: Grundy County | Suspicious activity | — | 0.2 h | — |
| 26 Oct 2023 | Illinois: Cook County | Suspicious activity | — | 0.2 h | — |
| 15 Sep 2023 | Illinois: Grundy County | Suspicious activity | — | 0.5 h | — |
| 30 Jul 2023 | Illinois: Winnebago County, Cook County, Will County, DeKalb County, Kendall County | Weather or natural disaster | 122,921 | — | — |
| 28 Jul 2023 | Illinois: Winnebago County, Cook County, Will County, DeKalb County, Kendall County | Weather or natural disaster | 122,921 | 37.0 h | — |
| 1 Jul 2023 | Illinois | Other | — | 2.1 h | — |
| 31 Mar 2023 | Illinois | Severe Weather | 65,000 | — | — |
| 3 Mar 2023 | Illinois: Cook County | Suspicious Activity | — | 0.1 h | — |
| 7 Feb 2023 | Illinois: DuPage County | Suspicious Activity | — | 0.1 h | — |
| 28 Jan 2023 | Illinois: Franklin County | Suspicious Activity | — | 1.0 h | — |
| 5 Mar 2022 | Illinois: DuPage County | System Operations | — | 20.7 h | — |
| 12 Oct 2021 | Illinois: Cook County | Suspicious Activity | — | — | — |
Close in the ranking
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Sources
DOE OE-417 files hold 48 Illinois reports; snapshot 9 Dec 2024, method.
Questions
How many Illinois reports are in the DOE files?
Illinois appears in 48 reports, 28th among states and DC, and 14 of them also name a second state.
Which Illinois report lists the most customers?
In Illinois-only reports the top customer count is 856,000, a Severe Weather report that began 10 Aug 2020 (Illinois: Cook County, Will County, DuPage County, Lake County and more).
What are typical OE-417 reports in Illinois?
The top DOE type in Illinois is Severe Weather; severe weather and natural disasters cover 48% of Illinois's reports.
Are outage reports in Illinois going up?
Illinois filed 14 in 2014 to 2018 and 34 in 2019 to 2023, a rise of 143%. The Illinois count may also reflect new filing habits.