Southern California Edison knew for years that its transmission towers around Eaton Canyon posed a risk of sparking a fire, company records show, with repairs long overdue.

An investigation by utility Southern California Edison is increasingly focused on whether a decommissioned line was re-energized, sparking the deadly blaze.

Investigators in Southern California are continuing to pursue answers as to what caused the Eaton Fire, which resulted in nearly 10,000 structures burning down in Los Angeles County. The latest findings point to a potential “zombie” power line.