Thunderstorms, a hurricane's whirling winds, an earthquake ... what's next?Extreme weather takes friends in Florida by surprise when whirling winds carry them northward into Canada and land them-broken and bruised-in Pondville. There, a giant sinkhole caused by an earthquake is discovered. A beloved building is leaning toward the sinkhole. Harry and the other Pondville residents try a solution offered by their new Florida friends. Danger, more mishaps, and cooperation make for an exciting, fast-paced adventure. But will they succeed in preventing disaster?