Which occupants are typically not immediately seriously threatened by the spread of fire?

Occupants on the floor below the fire are typically not immediately seriously threatened by the spread of fire because smoke and flames generally rise, following the principles of convection. Heat and smoke tend to accumulate in upper levels of a building, particularly in multistory structures. Therefore, while there are potential risks such as smoke siphoning through stairwells or other openings, those on the floor directly below the fire are often at a lower risk compared to those on the same floor or above the fire. Additionally, being below the fire provides a certain degree of separation from the immediate danger posed by the flames. This highlights the importance of understanding fire dynamics and potential threats based on a fire's location within a structure.