<b>A lively account of a controversial technology developed to mitigate earthquake risk and change how we live with threatening environments.</b><br><br>The Sistema de Alerta Sísmica Mexicano is the world’s oldest public earthquake early warning system. Given the unpredictability of earthquakes, the technology was designed to give the people of Mexico City more than a minute to prepare before the next big quake hits. How does this kind of environmental monitoring technology get built in the first place? How does its life-saving promise align with reality? And who shapes modern risk mitigation? In <i>¡Alerta!</i>, Elizabeth Reddy surveys this innovation to shed light on what it means to imagine a world where sirens could sound out an <i>¡alerta sísmica!</i> at any moment—and what it would be like to live in such a world.<br><br>Proponents of earthquake early warnings have<i></i>long held that the technology can save lives and limit ec