Al-Khoziny Islamic

In the Indonesian town of Sidoarjo, the hum of heavy machinery now mixes with the muffled cries of those trapped beneath a collapsed school. For three days, rescuers have been clawing through concrete and twisted steel in a race against time. Thirty-eight people are still missing after the Al-Khoziny Islamic Boarding School crumbled during evening prayers on Monday, killing at least three students and injuring nearly a hundred more.

Families keep vigil outside the site, clutching photographs, listening for scraps of news. Some say they can still hear voices from beneath the wreckage—an agonizing sign of life that propels rescuers …