"A hazard is an act or phenomenon that has the potential to produce harm or other undesirable consequences to a person or thing. Hazards exist with or without the presence of people and/or land development. Hazard identification is the process of collecting data to identify hazards that threaten a given area. A hazard differs from a threat in that a threat is directed at an entity, asset, system, network or geographic area. A hazard cannot be directed; it can be an actual or potential event."
Coffee Break Training - Fire Prevention and Public Education Series No. FM-2013-7
United States Fire Administration: http://www.usfa.fema.gov/