TYRE, Lebanon — Eleven-year-old Fatima Khashab helps her mother tidy the small area where their family sleeps, in a row of makeshift living quarters in a school gymnasium.

About 200 families are sheltering in the school in Lebanon’s southern coastal city of Tyre. Most are from villages farther south that have been destroyed in the latest war between Israel and the Iran-backed Lebanese militant group Hezbollah or are occupied by Israeli forces, like Fatima’s hometown of Mansouri.