The basic tasks of firefighters include: fire suppression, rescue, fire prevention, basic first aid, and investigations. Firefighting is further broken down into skills which include: size-up, extinguishing, ventilation, search and rescue, salvage, containment, mop up and overhaul. While sometimes fires can be limited to small areas of a structure, wider collateral damage due to smoke, water and burning embers is common. Utility shutoff is typically an early priority for arriving fire crews. Specific procedures and equipment are needed at a property where hazardous materials are being used or stored.