A humanitarian crisis (or humanitarian emergency) is an event or series of events that threaten the health, safety, livelihood or well-being of a large group of people. Humanitarian crises can be caused by war, conflict, persecution, disease outbreaks, human-made or natural disasters. In many humanitarian crises and emergencies around the world, multiple causes occur simultaneously. Humanitarian crises have devastating physical, psychological and social consequences for women, men, and children.