In California, authorities study environmental changes that fuel increasingly fierce wildfires, and a group of inmates train to become firefighters.

Firefighters enter a smoke-filled canyon to combat a deadly blaze. Turning their lives around, two inmates join firefighting crews.

Homeowners sift through the wreckage left behind by a fire. Rookies face tough training challenges. A veteran firefighter recalls a tragedy.

Rookies get their first taste of going toe-to-toe with the flames. An inmate-firefighter starts her new life, and a fire's detritus becomes artwork.