Book 2 of the Destroyers Series
Ever since becoming leader of the human hurricanes called Tempests, 16-year-old Janelle is overdue for a vacation. But the trip to Hawaii quickly presents its own problems when she meets Kenna, a local sophomore who makes the volcano start rumbling when she's nearby. So when Kenna gets kidnapped, Janelle has to find her. If she doesn't, Kenna's secret could mean the end of civilization and the death of everyone she loves.