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What happened
A transformer explosion was reported in Vacaville and was reported to have knocked out power and traffic signals. The full report could not be read, so the extent of the outage and whether anyone was hurt or property was damaged are not known.
Contributing factors
Not reported.
Lessons learned
A transformer failure can take out local power and traffic signals together.
Operators should be ready to restore supply and work with traffic authorities when signals go dark.
Until a full report is available, the cause and the scale of the outage should not be assumed.
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