Cook County, IL Power Outages
Utilities serving Cook County, Illinois don't yet share live outage data with DOE's ODIN feed. Check your electric company's outage map (listed below) for real-time status.
Cook County on the Illinois outage map
- Normal
- Minor
- Moderate
- Major
- Severe
- Limited data
Current outages
Weather alerts
No active outage-relevant weather alerts from the National Weather Service.
Cook County power outage history
Every significant outage recorded in Cook County since late 2014, with likely causes from NOAA storm reports
Since late 2014, DOE's EAGLE-I monitoring system has recorded 22 significant power outages in Cook County, meaning events that left at least 1% of customers in the dark. The largest (Aug 10–15, 2020) came when severe thunderstorms left 279,858 customers (12.9% of the county) without power.
From 2018 to 2025, the average customer here lost about 2 hr 8 min of power per year, less than the Illinois average of 2 hr 57 min. That ranks 88th of 102 Illinois counties for outage time, where 1st has the most.
August is the riskiest month: it accounted for 37% of all customer outage time from 2018 to 2025. On 4 days in that period, at least 5% of customers were out at the same time. Outage time in Cook County has fallen recently: about 1 hr 39 min per customer per year in 2022–2025, versus 2 hr 38 min in 2018–2021.
The most recent significant outage on record (Aug 17, 2025) affected 44,656 customers (2.1%) amid severe thunderstorms.
Worst outages on record
| # | When | Peak customers out | Days | Likely cause (NOAA) |
|---|---|---|---|---|
| 1 | Aug 10–15, 2020 | 279,858(12.9%) | 6 | Severe thunderstorms |
| 2 | Jul 16–18, 2024 | 155,204(7.2%) | 3 | Severe thunderstorms |
| 3 | Mar 13, 2015 | 144,538(6.7%) | 1 | Flooding |
| 4 | Nov 26–27, 2018 | 101,662(4.7%) | 2 | Winter storm |
| 5 | Feb 19–20, 2016 | 95,661(4.4%) | 2 | High winds |
Hours without power per customer, by year
When outages happen
Source: DOE/ORNL EAGLE-I recorded electricity outages, 2014–2025 (CC BY 4.0), with likely causes from the NOAA NCEI Storm Events Database. EAGLE-I coverage was partial before 2018, so averages use 2018–2025. Peak counts are the highest number of customers out at one time.
Who provides electricity in Cook County?
Electric companies with service territory in Cook County (EIA-861, 2025)
| Utility | Type | Customers (IL) | Avg. outage time / yr | Live data |
|---|---|---|---|---|
| ComEd | Investor Owned | 4,194,773 | Not reporting | |
| Village of Winnetka - (IL) | Municipal | 5,044 | Not reporting | |
| University of Illinois | State | 1 | Not reporting |
Customer counts are each utility's statewide total in Illinois. Source: U.S. Energy Information Administration, Form EIA-861 & Electric Power Annual.
Local outage news
No Cook County outage headlines in the past week.
Cities in Cook County
Chicago, Cicero, Schaumburg, Evanston, Arlington Heights, Skokie, Palatine, Des Plaines, Orland Park, Oak Lawn
Nearby counties
Cook County power outage FAQ
Is the power out in Cook County right now?
No outages are currently reported for Cook County by participating utilities. Live coverage is limited here, so If your power is out, report it to your electric company.
Which electric company serves Cook County?
According to EIA-861 service territory data, Commonwealth Edison Co, Village of Winnetka - (IL), University of Illinois provide electric service in Cook County, Illinois.
What was the worst power outage in Cook County?
The largest outage recorded by DOE's EAGLE-I system since 2014 was Aug 10–15, 2020. It peaked at 279,858 customers without power (12.9% of the county). NOAA storm reports for that period point to severe thunderstorms.
How often does the power go out in Cook County?
EAGLE-I has recorded 22 significant outages here since late 2014. From 2018 to 2025 the average customer lost about 2 hr 8 min of power per year, and on 4 days at least 5% of customers were out at once.
Cite this page
You may reuse our derived data under CC BY 4.0 with attribution. Underlying government data is public domain.
PowerOutageTracker.com. "Cook County, IL Power Outages." Accessed November 2, 2026. https://poweroutagetracker.com/outages/illinois/cook-county