 Washington, D.C. is in the middle of the survey at 73. Year-over-year return to work is the fastest in Boston at 10%. Again, D.C. is in the middle of the pack at 4.5%. Dan Ronan, WTOP News. It's 642. Did you know that summertime sadness is a real phenomenon? WTOP's Matt Koufax talked with a local doctor about the causes and how to avoid it during the warm weather we've been having recently.