As Israel and Hezbollah exchange fire in southern Lebanon, dozens of volunteer medics have decamped to a small hospital. They eat, sleep and pray there, waiting to respond to the next airstrike.

Lebanon's health ministry says the paramedics were carrying out a rescue mission in Nabatieh in response to an earlier attack that killed one person.

As Israel and Hezbollah exchange fire in southern Lebanon, dozens of volunteer medics have decamped to a small hospital. They eat, sleep and pray there, waiting to respond to the…