Hurricane Island. Hawkins Family Series, #5

The hurricane caught the Hawkins Family by surprise since this was supposed to be a vacation full of fun on a Caribbean island. Then news of the Hurricane came, and they were shocked that they were going to have to weather out the storm on the small island.  Luckily, there was a cave on the mountainside that served as a storm shelter. They survived the Hurricane and their house received only minor damage, so they fixed it up and continued their vacation.
Ten years later the Hawkins Family returned to Hurricane Island with their children. This vacation was even worse than the last time.  A large meteor came crashing down in the ocean. The Family took everything up from the beach house to the mountain house and waited out the tsunami. Due to the high elevation, they survived the tsunami that swamped the Island so were able to continue their vacation.
They found a space/time portal in the cave that led to other worlds. The portal had been created by the arrival of the meteor. One of the worlds was inhabited by dinosaurs, another frozen wasteland, and then another was similar to Earth. They decided to buy the Islands to gain access to and control of the portal. This is an adventure and science fiction novel with lots of excitement.