"Fire safety" encompasses a range of practices aimed at minimizing the harm caused by fire. This involves measures intended to prevent the start of uncontrolled fires and strategies to limit a fire's expansion and effects once ignited. Fire safety measures can be planned during a building's construction, implemented in existing structures, or taught to building occupants. Potential threats to fire safety, known as fire hazards, can involve situations that either increase the likelihood of a fire or obstruct escape routes in the event of a fire. Fire safety is a critical aspect of overall building safety and is often overseen by fire department members, including Fire Prevention Officers. These officers often inspect buildings for fire code violations, educate children on fire safety topics, and train newcomers in the Fire Prevention Division.