Hazmat awareness training teaches about hazardous materials - substances that can harm people, property, or the environment. Over 4 billion tons of hazardous materials are shipped in the US each year, including explosives, gases, flammids, and oxidizers. If there is a hazmat incident, call 911 immediately. Do not approach the area, which is divided into hot, warm, and cold zones according to risk level. Proper identification and handling of hazardous situations helps ensure safety.