McHenry County, IL Power Outages
Utilities serving McHenry 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.
McHenry 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.
McHenry County power outage history
Every significant outage recorded in McHenry County since late 2014, with likely causes from NOAA storm reports
Since late 2014, DOE's EAGLE-I monitoring system has recorded 108 significant power outages in McHenry County, meaning events that left at least 1% of customers in the dark. The largest (Feb 22–25, 2023) came when an ice storm left 36,109 customers (30% of the county) without power.
From 2018 to 2025, the average customer here lost about 4 hr 2 min of power per year, more than the Illinois average of 2 hr 57 min. That ranks 57th 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 14 days in that period, at least 5% of customers were out at the same time. Outage time in McHenry County has fallen recently: about 3 hr 34 min per customer per year in 2022–2025, versus 4 hr 30 min in 2018–2021.
The most recent significant outage on record (Nov 26, 2025) affected 2,273 customers (1.9%) amid high winds.
Worst outages on record
| # | When | Peak customers out | Days | Likely cause (NOAA) |
|---|---|---|---|---|
| 1 | Feb 22–25, 2023 | 36,109(30%) | 4 | Ice storm |
| 2 | Aug 11–13, 2021 | 30,959(25.7%) | 3 | Severe thunderstorms |
| 3 | Sep 25–26, 2018 | 24,431(20.3%) | 2 | Severe thunderstorms |
| 4 | Aug 10–12, 2020 | 18,037(15%) | 3 | Severe thunderstorms |
| 5 | Jun 8–9, 2015 | 16,151(13.4%) | 2 | Hail and lightning |
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 McHenry County?
Electric companies with service territory in McHenry County (EIA-861, 2025)
| Utility | Type | Customers (IL) | Avg. outage time / yr | Live data |
|---|---|---|---|---|
| ComEd | Investor Owned | 4,194,773 | Not reporting | |
| Rock Energy Cooperative | Cooperative | 10,572 | 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 McHenry County outage headlines in the past week.
Cities in McHenry County
Crystal Lake, Algonquin, McHenry, Huntley, Lake in the Hills, Woodstock, Cary
Nearby counties
McHenry County power outage FAQ
Is the power out in McHenry County right now?
No outages are currently reported for McHenry 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 McHenry County?
According to EIA-861 service territory data, Commonwealth Edison Co, Rock Energy Cooperative provide electric service in McHenry County, Illinois.
What was the worst power outage in McHenry County?
The largest outage recorded by DOE's EAGLE-I system since 2014 was Feb 22–25, 2023. It peaked at 36,109 customers without power (30% of the county). NOAA storm reports for that period point to ice storm.
How often does the power go out in McHenry County?
EAGLE-I has recorded 108 significant outages here since late 2014. From 2018 to 2025 the average customer lost about 4 hr 2 min of power per year, and on 14 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. "McHenry County, IL Power Outages." Accessed November 3, 2026. https://poweroutagetracker.com/outages/illinois/mchenry-county