Colorado Parks and Wildlife Logs and debris engulf a bridge in Poudre Canyon on Wednesday, July 21, the morning after flash flooding triggered multiple mudslides. Thursday, 7/22/2021 updates 5:26 p.m. - Heavy debris flow is complicating search and rescue efforts along the Poudre Canyon west of Fort Collins, where three people are still missing in the wake of flash flooding earlier this week. Crew members and search dogs scoured the canyon on Thursday to try to locate the unaccounted for residents. Rugged terrain, along with piles of burned-out logs and thick mud from the Cameron Peak Fire burn scar slowed down the process, said Jared Kramer, public information officer with the Larimer County Sheriff’s Office.