Yosemite Power Outage Shows Fire Safety System Doing Its Job

Visitors to Yosemite National Park spent Sunday night under an unusually dark sky — but the blackout may have prevented something far worse.

Pacific Gas & Electric (PG&E) confirmed the outage, which began shortly after 5 p.m. and affected about 600 customers, was triggered by its Enhanced Powerline Safety Settings (EPSS), a system designed to reduce wildfire risk.

EPSS technology automatically cuts power in high fire threat areas when it detects even the slightest disturbance on a line. These disruptions can come from something as small as a tree branch brushing against wires, a small animal, or even a bird in flight. While that means sudden outages are possible, it also greatly reduces the chance that a spark could ignite dry summer vegetation.

Because inspections must be done in daylight, the outage lasted overnight. On Monday morning, a helicopter patrol surveyed the affected powerline, and by 1:30 p.m., electricity was restored. PG&E has not yet determined the exact cause of the initial trigger.

The incident highlights how proactive measures — though inconvenient in the moment — are helping protect Yosemite’s forests, wildlife, and communities from potentially devastating wildfires. As California heads deeper into peak fire season, park visitors are encouraged to see such outages as a sign of progress in keeping high-risk areas safe.

In this case, the darkness over Yosemite wasn’t a disaster — it was a reminder that prevention works.