Transformer explosion damages homes in Montebello

A transformer linked to an outage on Ferguson Drive in Montebello failed on Thanksgiving Day, shaking homes and sending a power surge through lines. Reporting described damage to wiring and appliances in several homes, a vehicle destroyed by fire, and eight households left without power. Metal structures in at least one home were reported to have become electrified. Southern California Edison said 2,450 customers lost power. The Montebello Fire Department reported an underground vault explosion nearby later the same day. Edison initially told residents the outage was caused by lightning. After further questions, a spokesman said an investigation was ongoing. The National Weather Service reported no evidence of lightning in the area that morning, only rain. Residents also reported an earlier transformer failure eight days before and utility work on the same line the day before the explosion.

The cause had not been established. Edison initially attributed the outage to lightning, which the National Weather Service data did not support, and said an investigation was ongoing. Residents reported a prior failure on the line and work the day before; those points were not independently confirmed in the report.

1. Check independent weather data before attributing an outage to lightning.
2. Review recent failures and work on the same circuit while the cause is still under investigation.
3. Tell affected customers clearly what the utility will restore and what remains their responsibility.

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