Ron Book, chairman of the Miami-Dade County Homeless Trust, right, talks with George Galindo, who is homeless, left, on Saturday in Miami. The Homeless Trust and other agencies are encouraging the homeless to go to a shelter for the night in advance of a cold front. Temperatures are forecast to be in the high 30s overnight in South Florida. (AP Photo/Lynne Sladky) (Lynne Sladky/AP)