The last time a major tsunami hit the Caribbean region was in 1946, after an 8.1-magnitude earthquake struck the Dominican Republic on the island of Hispaniola.
At Playa Rincón, the sea rushed 700m (2,300ft) inland, according to a man who clung to the top of an almond tree to survive. Waves were 5m high in places and 1,600 people died across the north-east coast. Small tsunami waves were also recorded in Puerto Rico, Bermuda and even New Jersey.
Since then, a handful of tsunamis have occurred – in Panama and Costa Rica in 1991 after an earthquake, and in Montserrat in 1997 after a landslide of volcanic debris. After the devastating earthquake in Haiti in 2010, sub-sea landslides generated waves that killed three people.