A recent investigation by the Greek Fire Service has determined that the massive wildfire that swept through northwest Chios in August 2025 was caused by an electrical fault in a distribution network pole. The blaze, which led to extensive destruction and prompted a state of emergency declaration, reportedly began near the base of the pole.

The report, which relied on detailed on-site inspections, analysis of burn patterns, and fire-weather data from the day of the incident, points to an electrical arc as the ignition source. Officials emphasized that the condition of the power infrastructure at the time contributed to the fire’s rapid start.

Unusually high temperatures, low humidity, and strong winds at the time accelerated the wildfire, creating a critical situation. The investigation also explicitly ruled out other potential causes, including human activity, confirming that the fire resulted solely from the distribution network’s failure.

Fire experts note that in the first hours of the fire on August 12, 2025, conditions were particularly severe, with winds averaging 25–30 km/h and extremely dry atmospheric conditions. By August 13–15, weather conditions improved slightly as wind speeds decreased and humidity levels rose, helping to slow the fire’s spread.

The findings are expected to play a central role in ongoing inquiries into infrastructure maintenance and safety measures, particularly during periods of elevated fire risk.