Substation transformer fire cuts power to F.E. Warren Air Force Base, Wyoming
EIR-0558Provisional entry. Confirmed: a transformer fire at the F.E. Warren AFB substation caused a power outage beginning Saturday night, with restoration ongoing as of the report; not yet confirmed: the technical cause of the fire, which organisation operates the substation, and the total duration of the outage. No further update is scheduled; the entry stays provisional until new information is published.
A fire at a substation transformer knocked out power across F.E. Warren Air Force Base near Cheyenne, Wyoming, on a Saturday night. The base reported that critical components at the substation were damaged, and power had not been restored by the following day. Crews from the Western Area Power Administration and High West Energy were working with the base to restore supply, with an estimated repair time of 12 to 24 hours from the Sunday update. The outage occurred during a period of high temperatures, prompting the base to issue heat safety guidance to personnel and families living on site while power remained off. No injuries, fatalities or evacuations were reported in connection with the fire. Total restoration time and the technical cause of the fire have not been confirmed in reporting so far.
The base attributed the outage to damage to critical components at the substation caused by the transformer fire; no further technical cause was disclosed in the source, and it is not confirmed which organisation operates the substation.
- Sites reliant on a single substation feed should plan for extended outages when critical transformer components are damaged.
- Clear public communication of estimated restoration timelines helps manage safety risks during heatwave conditions.
- Coordination between site operators and external grid utility crews is essential for timely substation repairs.
Published 2026-09-08. Written from public reporting. Descriptive, not investigative. See the data accuracy disclaimer.