We have a trailer that has a maze with multiple levels, stairs, movable walls, simulated wires and rafters. We use this to practice search and rescue in a structure fire. We can fog this trailer up to simulate a fire with a fog machine.
This is what the firefighters trained on during one of two trainings in May. They practiced searching for persons and communication with each other. A structure fire is a loud environment and team member communication is important to practice.