 to issue a major disaster declaration. This would allow FEMA to provide them critical assistance. Fire damage stretches between the towns of Peridot and San Carlos, where power lines have also been knocked out. Fewer than 6,000 residents live within these communities on the nearly 2 million acre reservation. This is the worst fire they've experienced in three decades. Fire officials say they suspect the cause was arson. For NPR News, I'm Gabriel Pietrazio in Phoenix.