Power outages in Union, IL
Live outages for Union and the surrounding area, updated every 10 minutes. Union has 684 residents.
Right now
No live outage data for Union yet.
Outage map
UnionMcHenry County
Outage history in McHenry County, which includes Union
2014–2025 recordMcHenry County averaged 8.3 significant outages a year in 2023–2025, fewer than most Illinois counties.
In the 12 months to December 2025, there were 8. Half were over within 1.5 hours; the longest lasted 34 hours, starting August 16, 2025.
The largest on record began February 22, 2023, with 36,109 customers out at once.
Outages are most common in July.
8.3significant outages a year (2023–2025)
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At least 1% of the area's customers, and at least 100, without power at the same time. Outages less than 6 hours apart count as one.1 hourtypical (median) length
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Half of significant outages here ended sooner than this, and half lasted longer.2.7 dayslongest on record (August 2021)
36,109most customers out at once
| Largest events (start) | Peak out | LastediHow long this area stayed at or above the significant-outage line, not how long any one home was without power. | Customer-hoursiCustomers out multiplied by hours out, added up over the event. 1,000 customers out for 3 hours is 3,000 customer-hours. |
|---|---|---|---|
| February 22, 2023 | 36,109 | 2.3 days | 837,082 |
| August 11, 2021 | 30,959 | 2.7 days | 747,961 |
| September 25, 2018 | 24,431 | 24 hours | 216,157 |
| August 10, 2020 | 18,037 | 1.8 days | 265,851 |
| August 16, 2025 | 13,250 | 34 hours | 214,806 |
Recorded outages from EAGLE-I, Oak Ridge National Laboratory (CC BY 4.0).i
From EAGLE-I, Oak Ridge National Laboratory's record of utility outage data every 15 minutes since 2014 (CC BY 4.0). It covered about 9 in 10 U.S. customers.