Flipper - Season 3 Episode 5
The Warning

After witnessing all the marine animals fleeing the area, Bud and Sandy alert the local folk of a hurricane headed their way, despite their fathers instructions and a clear weather forecast. No such hurricane eventuates and believing they have wasted time and money in securing their boats, the towns people look to Porter for compensation. It is only after a tidal wave hits that everyone in the town is grateful to Flipper and the boys for the warning.