Andrea Carter and the San Francisco Smugglers — Susan K. Marlow

When a winter flood in Fresno closes school temporarily, Andi is outraged when she's sent to live with a spinster aunt in San Francisco, doomed to finish the winter term of school at Miss Whitaker's Academy for Young Ladies. But her new roommate, the equally untamable Jenny, and the timid but tenderhearted Lin Mei, a young girl who works at the school, expose her to a whole new world. Soon these three new friends find themselves in more trouble than they can handle.