Unlikely.
Anyway this is what I found that could be useful to understand what happened:
Quote:
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That's right. So if you win against Beato, then on October 6, when the typhoon has passed, the people who were trapped on the island will return
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This is Lambda saying it, but she's talking to Ange, so since Ange should definitely know if the typhoon was still there on October 6 it's very unlikely that Lambda is lying.
It can still be argued that the typhoon passed in the morning and was still active at midnight of October 5, but as I said it is just a lot easier to think the typhoon subsided around midnight, rather than thinking it just appeared to have subsided, then unleashed some kind of disaster and soon afterward vanished.