Shelter is often needed when people lose their homes to a natural or manmade disaster. Displacement forces victims to take refuge in makeshift shelters or in locations unprepared for a suddenly larger population. In 2010, the earthquake in Haiti moved people to form tent cities on public property, taking up space and creating unsanitary and insecure conditions. That same year, natural disasters displaced 42 million people total around the world. Migration as a result of emergency conditions can also produce political conflict and environmental degradation, adding to the harm caused by the disaster.