When a fire broke out last week at a Mexican detention center for migrants and asylum seekers in Ciudad Juárez, just across the border from El Paso, it seemed like cosmically bad luck, a double tragedy: People forced — by political instability, criminal violence, climate change or economic…

She has no memory of the earthquake that broke her back and swallowed her daughters. Khaira Al Halbouni only knows what her husband told her afterward. In the middle of the night the building shook. He grabbed one daughter, Bisan, and their son, Ali. Take Mayas, their younger daughter, and run, he…