From the Southwestern United States comes this collection of seventeen short stories about heat and global warming--climate's effect on life in all its harshness and kindness, humanity's experience of struggle and triumph. From the eleventh century A.D. to the present, the stories feature specific geographical locations where heat and fire have left their mark. Colorado, New Mexico, Utah, Arizona, California, Nevada, and parts of Texas--these Southwestern states provide the setting for the stories. The Heat's On represents that broad geographical area and addresses a variety of subjects touched by climate change. The stories range from ancient Native American experiences with volcanic eruption to modern subjects on irrigation, forest fires, drought, and a nostalgic trip along the Colorado River that serves the entire basin.