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Grid infrastructurePuerto RicoEIR-1220

Explosion and fire at a LUMA Energy substation in Carolina leaves over 217,000 without power

Sept 2026Published 24 Sept 2026Responsible editor: Chief Editor

MajorElectricalProvisional
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
LUMA Energy substation in Carolina, Puerto Rico
Operator
LUMA Energy
What
Explosion and fire
Cause
Not reported
Outcome
More than 217,000 customers without power across several municipalities

Companies named in the reporting of this entry (being named is not a finding of fault): LUMA Energy

What happened

A report dated 24 September 2026 said more than 217,000 customers across several municipalities in Puerto Rico were without power after an explosion and fire at a LUMA Energy substation in Carolina. The report said the outages affected multiple areas. It did not say what failed, whether anyone was hurt, or how long the outages lasted.

Contributing factors

Not reported. The source does not give a cause.

Lessons learned

  1. A substation fire can cut supply to a very large number of customers at once, so operators should be ready to confirm the affected area quickly.
  2. Early public updates should state what is known and what is not yet known, including cause and expected restoration.
  3. Until a cause is reported, treat fire detection, isolation and restoration planning as open checks rather than as findings.

More lessons on outages, backup supply and restoration, emergency response and public communication, detection and monitoring, from every incident on the register.

Not yet known

  • Cause of the explosion and fire
  • Number of injuries if any
  • Duration of the power outages

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

Source

jfeed.com

Published 2026-09-24. 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 by year, free with a credit (PNG).

Grid infrastructure incidents in Puerto Rico: 4 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.

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