South of Nowhere - Jeffery Deaver

In a race against time and nature, there's only one man you want on your side.

In northern California a small town teeters on the brink of disaster as flood waters bear down on it. Colter Shaw, however, is on an even more urgent rescue mission - a family swept away in the initial deluge. The clock is ticking, and their survival window is rapidly closing. However, the impending disaster raises questions - is the town's vulnerability a natural occurrence, or is there a more human element at work?

Teaming up with his sister, Dorion, Shaw must uncover the truth, and quickly, otherwise there will be no town, and no one, left to save.