Photo: From left, Meaghan McCarthy, Kim Perley, Jamie Frank, and Colleen Hannigan tried to stay dry beneath a canopy of umbrellas at the annual WBOS EarthFest yesterday at the Hatch Shell. The event, which drew 30,000 people, featured music, face painting, arts and crafts, food samples, and a dose of environmental education. (Globe Staff Photo / Wendy Maeda)