"It's the Great Flood of 1993, and much of the midwestern U.S. is covered with water. But the tiny town of Hardin, Missouri, is covered with something much, much worse..." --from back cover.
Rex is the most famous and spoiled movie-star dog in the world. When he gets lost, he is taken in by a firehouse. He learns that being a "Firehouse Dog" can be just as exciting as and even more rewarding than being a Hollywood star.