Blanco CountyPower Outage History
2017–2025 · Texas
Worse than average — more frequent or longer outages than most counties.
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Feb 11, 2021 | 160 hrs | 5,342 (97%) | Winter Storm Uri |
| Jul 20, 2023 | <1 hr | 5,064 (92%) | Drought |
| May 19, 2023 | <1 hr | 4,991 (91%) | Drought |
| Oct 25, 2025 | 4 hrs | 4,761 (87%) | Tornado |
| Mar 21, 2022 | 5 hrs | 3,484 (64%) | Drought |
Over the 9 years from 2017 to 2025, Blanco County recorded 388 distinct power outage events, averaging 3.4 hours per event.
The single worst outage on record in Blanco County started February 11, 2021 (Winter Storm Uri), lasting 160 hours and leaving up to 5,342 customers without power (97% of the county) at its peak.
May has historically been the worst month for outages in Blanco County, with 59 events recorded during that month across the dataset.
Based on this history, Blanco County earns a Reliability Grade of D, placing it in the 20th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Blanco County's outage profile
See more picks in our Best Dual-Fuel Portable Generators for Power Outages roundup.
Champion Power Equipment 4375-Watt Dual Fuel RV Ready Portable Generator with Free 3-Year Warranty
Outage-prep kit
See our outage-prep guides or the Texas storm prep checklist.
Similar counties in Texas
Counties with the closest reliability grade and national percentile to Blanco County.
| County | Grade | National percentile |
|---|---|---|
| Callahan County | F | 20th |
| Grimes County | D | 20th |
| Collingsworth County | F | 20th |
| Austin County | F | 20th |
| Wharton County | D | 21st |
Most reliable counties in Texas
The top 3 counties in Texas by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Zavala County | A | 95th |
| Jasper County | A | 94th |
| Fayette County | A | 91st |
Least reliable counties in Texas
The bottom 3 counties in Texas by reliability grade and percentile.
| County | Grade | National percentile |
|---|---|---|
| Trinity County | F | 2nd |
| Orange County | F | 2nd |
| Marion County | F | 4th |
Most reliable counties nationally
The top 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | South Dakota | A | 100th |
| Clearwater County | Minnesota | A | 99th |
| Limestone County | Alabama | A | 99th |
Least reliable counties nationally
The bottom 3 counties nationally by reliability grade and percentile.
| County | State | Grade | National percentile |
|---|---|---|---|
| Clay County | West Virginia | F | 0th |
| Lincoln County | West Virginia | F | 0th |
| Cameron Parish | Louisiana | F | 0th |
FAQ
How often does power go out in Blanco County?
Between 2017 and 2025, Blanco County recorded 388 outage events, averaging 3.4 hours each.
What is Blanco County's reliability grade?
Blanco County has a Reliability Grade of D, in the 20th national percentile.
What was the worst power outage in Blanco County?
The worst outage on record started February 11, 2021 (Winter Storm Uri), lasting 160 hours and affecting up to 5,342 customers.