County annual report · FIPS 47157
2025 Shelby County, TN Power Outage Report
In 2025, customers in Shelby County, TN went without power for an average of 7.2 hours, a total of 3.0M customer-hours (Tennessee average 4.3 hours). That ranks 15th worst of 81 Tennessee counties and 1114th of 3,000 nationally.
Compared with TN, the US and 2024
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Shelby County, 2025
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | February 25, 2025 12:15 | February 27, 2025 07:30 | 1d 19h | 73,352 | 51K |
| 2 | June 9, 2025 11:15 | July 31, 2025 07:45 | 51d 20h | 16,518 | 561K |
| 3 | February 5, 2025 14:00 | February 6, 2025 07:15 | 17h 15m | 15,280 | 17K |
| 4 | August 8, 2025 09:00 | August 14, 2025 06:30 | 5d 21h | 14,771 | 219K |
| 5 | October 5, 2025 06:45 | October 10, 2025 22:15 | 5d 15h | 12,987 | 71K |
| 6 | March 14, 2025 12:30 | March 20, 2025 20:30 | 6d 8h | 12,398 | 270K |
| 7 | September 15, 2025 10:15 | September 26, 2025 10:15 | 11d | 11,463 | 180K |
| 8 | September 30, 2025 12:00 | October 1, 2025 09:15 | 21h 15m | 10,838 | 8,009 |
| 9 | March 3, 2025 14:30 | March 4, 2025 07:45 | 17h 15m | 10,641 | 3,337 |
| 10 | January 5, 2025 01:00 | January 10, 2025 06:45 | 5d 5h | 10,537 | 30K |
Outage episodes by size in 2025: 131 reached 100+ customers, 92 reached 1,000+ customers, 11 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Shelby County reported on EIA Form 861 for 2025, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Southwest Tennessee E M C | 2023 | 11.7 hrs | 3.98 | 3.9 hrs | 2.67 |
| City of Memphis - (TN) | 2024 | 5.5 hrs | 1.95 | 4.7 hrs | 1.74 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Tennessee's customers in 2025; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 422,904 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Shelby County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Shelby County, TN annual power outage report, 2025, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2025/tennessee/shelby-county