What is the plume in relation to a fire?

The plume refers to the column of hot gases, flames, and smoke that rises above a fire. This phenomenon occurs as combustion produces heat, causing the gases to expand and rise due to their lower density compared to the surrounding cooler air. The movement of the plume is significant in fire investigation and analysis, as it can help determine the fire's intensity, the materials burning, and the fire's behavior in various environmental conditions. Understanding the plume can also aid in predicting how a fire may spread and how smoke may affect visibility and toxicity in a given area, which is crucial for firefighter safety and effectiveness during an incident.