MHC Warming Center Hours: Open nightly when the temperature is 40 degrees or below, from 7 p.m. to 9 a.m.. Location: 603 S Memorial Blvd, Martinsville, VA 24112. What it offers: A warm, safe place to sleep and a hot meal. How to check schedule: Weekly schedules are posted on the center’s Facebook page every Saturday and at the Martinsville Library. A white flag is placed at the entrance on nights when the center is open. Transportation: A pickup location for transportation is available at…