Hillsborough County Power Outage History
2014–2025 · Florida
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 |
|---|---|---|---|
| Oct 9, 2024 | 35 hrs | 520,308 (52%) | Hurricane Milton |
| Oct 11, 2024 | 7 hrs | 504,067 (50%) | Hurricane Milton |
| Oct 11, 2024 | 7 hrs | 491,231 (49%) | Hurricane Milton |
| Oct 11, 2024 | 1 hrs | 471,134 (47%) | Hurricane Milton |
| Oct 11, 2024 | 10 hrs | 468,686 (47%) | Hurricane Milton |
Over the 12 years from 2014 to 2025, Hillsborough County recorded 7,222 distinct power outage events, averaging 1.5 hours per event.
The single worst outage on record in Hillsborough County started October 9, 2024 (Hurricane Milton), lasting 35 hours and leaving up to 520,308 customers without power (52% of the county) at its peak.
July has historically been the worst month for outages in Hillsborough County, with 871 events recorded during that month across the dataset.
Based on this history, Hillsborough County earns a Reliability Grade of D, placing it in the 26th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Hillsborough County's outage profile
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Similar counties in Florida
Counties with the closest reliability grade and national percentile to Hillsborough County.
| County | Grade | National percentile |
|---|---|---|
| Orange County | D | 26th |
| Citrus County | D | 24th |
| Lake County | D | 24th |
| Escambia County | D | 23rd |
| Hendry County | D | 23rd |
FAQ
How often does power go out in Hillsborough County?
Between 2014 and 2025, Hillsborough County recorded 7,222 outage events, averaging 1.5 hours each.
What is Hillsborough County's reliability grade?
Hillsborough County has a Reliability Grade of D, in the 26th national percentile.
What was the worst power outage in Hillsborough County?
The worst outage on record started October 9, 2024 (Hurricane Milton), lasting 35 hours and affecting up to 520,308 customers.