Where did the Smith family and the others on the beach go to escape from the tsunami?

The geography lessons of Tilly tipped the Smith family off about the looming danger. Her mother, seeing her daughter going berserk and talking about earthquakes under the sea, took it seriously. As a result, the Smith family and a few other families on the beach went to the swimming pool at the hotel initially. After a while, when the waves hit, the families ran for their lives and ended up on the third floor of the hotel to escape from the tsunami.