Hawks Don't Say Goodbye — Stephen A. Bly

It's summer in Galena, Nevada. Everyone is leaving town for good! After the harshest winter on record and the shutdown of the Shiloh Gold mine, Nathan and his friends watch as businesses board up and houses empty. Rumor has it that even their school may close. Who will be the next to move away?
When the bank is robbed, Nathan and Leah get their answer. It's not one they'd have chosen. In facing the loss of his friends, Nathan discovers what makes a town feel like home.
Finally, in a deserted hotel, Nathan and Leah come face-to-face with the bank robbers. They encounter the most frightening showdown of their lives.