EurekAlert! -- Five years ago Hurricane Katrina and the flooding of New Orleans caused the evacuation of 1.5 million Gulf Coast residents. After a year, 500,000 people remained displaced, many residing in highly transitional shelters, including the notorious FEMA trailer parks. Now at the five-year mark, substantial consequences from this prolonged displacement have resulted in widespread mental health issues in children living in the region, according to a new study by the National Center for Disaster Preparedness (NCDP) at Columbia University’s Mailman School of Public Health and a related white paper from the Children’s Health Fund (CHF).