The 7.0-magnitude earthquake near Port-au-Prince, Haiti, on January 12, 2010, has devastated the city and surrounding areas. Approximately 3 million people — one third of the population of Haiti — have been affected, and Port-au-Prince's 3 largest medical centers have been devastated. As medical relief personnel pour in, use Medscape's Alert Center to find out what you can do to help, learn how the situation is progressing, and discuss the situation with your colleagues.