One function of filmmaking is archival: the medium always serves to record, whether through documentary or narrative, the feeling, style, and atmosphere emanating from a particular time. Following a decade from the release of 2012’s Burn, which aptly captured the notoriously overextended Detroit Fire Department in the years before the city declared bankruptcy, co-directors Tom Putnam and Brenna Sanchez have returned with a follow-up in Burn X. The film follows a dizzying stretch of work that’s remained extremely perilous — in part due to underfunding amid variously visible signs of an evolving urban landscape.