Rain Reign by Ann M. Martin
Publication Date: 2014-10-07
Not everyone understands Rose's obsessions, her rules, and the other things that make her different - not her teachers, not other kids, and not her single father. When a storm hits their rural town, rivers overflow, the roads are flooded, and her dog Rain goes missing. Now Rose has to find her dog, even if it means leaving her routines and safe places to search.