Hazardous locations refer to areas where the presence of flammable gases, vapors, liquids, or combustible dusts can create a risk of fire or explosion. These areas can be found in industries such as chemical plants, oil refineries, and mines. It is crucial to understand the potential hazards and implement safety measures such as explosion-proof equipment, ventilation systems, and proper labeling. The processes or products that may contribute to an explosive atmosphere must be evaluated against Canadian or international safety standards.