When the magic tree house whisks Jack and Annie back to Galveston, Texas, in 1900, they find out that a big storm is coming. But no one believes there is any danger. As the storm grows, seawater floods the city. Now everyone needs hlep! Jack and Annie have a little magic and a lot of hope - but will it be enough? In a story of many hearoes, Mary Pope Osborne weaves fact and fiction together, sharing a part of American history that shaped the future. -- Provided by publisher.