County annual report · FIPS 32003
2018 Clark County, NV Power Outage Report
In 2018, customers in Clark County, NV went without power for an average of 1.4 hours, a total of 1.4M customer-hours (Nevada average 1.7 hours). That ranks 11th worst of 15 Nevada counties and 2124th of 2,798 nationally.
Compared with NV, the US and 2017
Coverage line is EAGLE-I's share of Nevada customers tracked each year.
Biggest outages in Clark County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 12, 2018 07:30 | August 17, 2018 03:00 | 4d 19h | 54,821 | 497K |
| 2 | September 22, 2018 21:15 | September 23, 2018 12:30 | 15h 15m | 29,918 | 37K |
| 3 | July 19, 2018 11:00 | July 27, 2018 16:00 | 8d 5h | 23,953 | 138K |
| 4 | August 10, 2018 13:15 | August 12, 2018 04:00 | 1d 14h | 22,155 | 24K |
| 5 | November 22, 2018 14:15 | November 23, 2018 08:15 | 18h | 13,438 | 28K |
| 6 | February 24, 2018 20:00 | February 25, 2018 05:00 | 9h | 11,988 | 14K |
| 7 | July 10, 2018 08:15 | July 16, 2018 12:00 | 6d 3h | 11,681 | 55K |
| 8 | July 9, 2018 11:30 | July 10, 2018 04:45 | 17h 15m | 10,950 | 7,048 |
| 9 | June 15, 2018 13:45 | June 16, 2018 13:30 | 23h 45m | 8,651 | 5,961 |
| 10 | October 15, 2018 11:15 | October 16, 2018 08:15 | 21h | 8,419 | 19K |
Outage episodes by size in 2018: 254 reached 100+ customers, 98 reached 1,000+ customers, 8 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 Clark County reported on EIA Form 861 for 2018, 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 |
|---|---|---|---|---|---|
| Southern California Edison Co | 2018 | 2.3 hrs | 0.87 | 71 min | 0.72 |
| Valley Electric Assn, Inc | 2018 | 1.6 hrs | 1.50 | 69 min | 1.00 |
| Nevada Power Co | 2018 | 1.9 hrs | 0.69 | 46 min | 0.49 |
| Overton Power District No 5 | 2018 | 88 min | 1.36 | 13 min | 0.21 |
| WAPA-- Western Area Power Administration | - | - | - | - | - |
| NV Energy | - | - | - | - | - |
| Aha Macav Power Service | - | - | - | - | - |
| City of Boulder City - (NV) | - | - | - | - | - |
| Colorado River Comm of Nevada | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 95% of Nevada's customers in 2018; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 1,008,802 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. Clark County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Clark County, NV annual power outage report, 2018, 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/2018/nevada/clark-county