The signs advised motorists of the dangers of the tides and also reminded them to check tide timetables.

BBC: Car under water on Holy Island causeway

Low tide makes for excellent guided mudflat hiking, and incoming tides can be dangerous for those unprepared.

BBC: Exploring Germany��s northernmost island

Consider, for example, the solution that the U.K. adopted to prevent the flooding of London by surge tides that occur under certain meteorological conditions and because tide levels have been rising two feet per century.

FORBES: Beyond Copenhagen