Frequently travelers Jack and Annie travel back in time once again with the help of their magic tree house. But there's a storm brewing in the Gulf, and rain is on its way. Since the youngsters have read a little bit about the hurricane that wreaks havoc on Galveston, Texas in 1900, where the tree house has taken them, they are determined to help the city's residents get to safety. But since weather forecasters and newspaper articles declare that there is no need to worry, no one listens to them. They manage to rescue some dogs and help some humans, and seek shelter with Rose, a kind-hearted woman, and her daughter who are waiting for the woman's husband to come home. Along with Rose, the siblings float through the flood waters after they crash into her home and make their way to the Ursuline Academy where others have gathered for refuge. There are several dramatic scenes and vivid descriptions of the rising water in this account that might provide some comfort to those who have experienced similar trauma. Once again, a book shows that heroism comes in all sorts of shapes and sizes.