Final answer:
The exact location where Mahmoud's family spends the night when there is no boat is not explicitly mentioned. The extracts suggest a sense of displacement without a permanent place to stay.
Step-by-step explanation:
It seems that Mahmoud's family does not have a consistent place to stay overnight when there is no boat available. In the passages provided, there is no explicit mention of where they spend the night under such circumstances. However, the context of the extracts implies a sense of displacement or difficulty in finding a secure place to stay, which may suggest that Mahmoud's family is in a challenging situation, likely seeking refuge or in transit. Without a specific passage that directly answers the question, we can only infer that they may have to find whatever shelter is available to them, which could range from staying with acquaintances to seeking temporary refuge in makeshift accommodations.