By Jana Choukeir and Khalil Ashawi

TYRE, July 6 (Reuters) - On a beachfront in the coastal city of Tyre, war has finally abated just enough for children to play in the waves and families to gather under parasols as life slowly returns to southern Lebanon.

But away from the shore, people coming home after months of exile are having to adapt to harsh new realities: the threat of conflict between Israel and Iran-backed Hezbollah flaring up again and the challenge of rebuilding from the destruction Israeli bombs have wreaked on their hometowns.