In the case of the Eaton Fire, the investigators are likely to use magnets to help them hunt for the tiny, melted pieces of metal that could have been shed by power lines if they slapped together. But the existence of the metal doesn’t necessarily indicate that’s how the fire started, Nordskog said.

Amid the ongoing Los Angeles wildfires, police confirmed they’ve taken a suspect into custody for “possible arson” near the Kenneth Fire in California’s Woodland Hills.