Public and private programs that provide emergency planning, preparedness, mitigation, response, relief and-or recovery services prior to, during and after a major fire, flood, hurricane, earthquake, tornado, tsunami, volcanic eruption, landslide, mudslide, snowstorm, drought, famine, explosion or nuclear accident, the outbreak of civil unrest, or other large-scale emergency of natural or human origin that disrupts the normal functioning of a community. Localized incident such as a house fire which has made residents homeless. There are four recognized phases of disaster work: preparedness, mitigation, response and recovery. Many community agencies add disaster relief as a phase during response and early recovery.