Marshall County Power Outage History
2014–2025 · Illinois
Worse than average — more frequent or longer outages than most counties. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Jul 15, 2024 | 106 hrs | 5,527 (70%) | Tornado |
| Dec 28, 2015 | 53 hrs | 4,821 (61%) | Ice Storm |
| Feb 7, 2017 | 1 hrs | 3,554 (45%) | Unnamed event |
| Nov 25, 2014 | 5 hrs | 3,543 (45%) | Unnamed event |
| Apr 1, 2023 | 3 hrs | 2,959 (37%) | Unnamed event |
Over the 12 years from 2014 to 2025, Marshall County recorded 448 distinct power outage events, averaging 3.8 hours per event.
The single worst outage on record in Marshall County started July 15, 2024 (Tornado), lasting 106 hours and leaving up to 5,527 customers without power (70% of the county) at its peak.
July has historically been the worst month for outages in Marshall County, with 55 events recorded during that month across the dataset.
Based on this history, Marshall County earns a Reliability Grade of D, placing it in the 22nd percentile nationally for grid reliability (higher percentile = more reliable).
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Similar counties in Illinois
Counties with the closest reliability grade and national percentile to Marshall County.
| County | Grade | National percentile |
|---|---|---|
| Henderson County | F | 19th |
| Putnam County | D | 26th |
| Edgar County | D | 29th |
| Stark County | F | 13th |
| Washington County | D | 31st |
FAQ
How often does power go out in Marshall County?
Between 2014 and 2025, Marshall County recorded 448 outage events, averaging 3.8 hours each.
What is Marshall County's reliability grade?
Marshall County has a Reliability Grade of D, in the 22nd national percentile.
What was the worst power outage in Marshall County?
The worst outage on record started July 15, 2024 (Tornado), lasting 106 hours and affecting up to 5,527 customers.