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Grid infrastructureUnited StatesEIR-0737

Transformer explosion reported to have cut power to about 30,000 in Tuolumne County

2026Published 15 Sept 2026Responsible editor: Chief Editor

Estimated damageEstimated by the register's adjusterHow? Know the real figure?
Figure hidden: shown to subscribersLow confidence
supply cut for about •• daysShown in the record →Full estimate
Where
Tuolumne County, United States
What
Transformer explosion cut power to about 30,000
Cause
Not reported
Outcome
Power knocked out to about 30,000 people

An ABC10 headline reports that a transformer explosion knocked out power to about 30,000 people in Tuolumne County. The article body could not be retrieved, so the site, operator, cause, injuries and how long the outage lasted are not known.

Not reported.

  1. A transformer explosion on the grid can interrupt supply to tens of thousands of customers, so operators should review single point of failure risks in substation design.
  2. When only a headline is available, operators must verify the asset, location and restoration time before acting on public reports.

More lessons on outages, backup supply and restoration, from every incident on the register.

  • Site and operator of the transformer
  • Cause of the explosion
  • Injuries if any
  • Duration of the power outage

This entry is updated when these are reported. Get an alert for the next one like it.

Published 2026-09-15. Written from public reporting. Descriptive, not investigative. See the data accuracy disclaimer.

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Chart to reuse with this story: Grid infrastructure incidents in the United States, by year, free with a credit (PNG).

Grid infrastructure incidents in the United States: 449 entries, with a free alert for the next one.

Substation and transformer fires: the counts, the latest entries and a free alert for the next one. Also: transformer explosions.

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