Transformer explosions and fire cut power to Arta villages, Greece

Several villages in the Arta region of western Greece lost electricity for several hours after powerful successive explosions occurred in a transformer at the Grammenitsa Extra High Voltage Center, operated by power utility PPC. The explosions, which happened shortly before midnight, triggered two small fires within the substation. The fire then spread to nearby grassland and forested areas. Fire crews attending the scene had to work around downed live power cables, which created a risk of electrocution during firefighting operations. Settlements in the mountainous part of the prefecture and in the Kambos area were affected by the outage. Power was fully restored to all affected villages by mid-morning, according to state broadcaster ERT.

Transformer explosions at the extra-high-voltage substation caused fire to break out and spread to adjacent grassland and forest; downed live cables complicated the firefighting response. The underlying cause of the transformer explosions was not reported.

1. Transformer failures at high-voltage substations can escalate quickly into fires that spread to surrounding vegetation, so firebreaks and vegetation management around substations reduce wildfire risk.
2. Downed live cables during a substation fire pose an electrocution hazard to responders, underscoring the need for rapid de-energisation protocols coordinated between utilities and fire services.
3. Clear restoration procedures and network redundancy help minimise the duration of outages affecting dependent communities.

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