ScienceDaily (Apr. 21, 2009) -- Up to 30,000 residents and tourists could be under threat from a newly discovered tsunami risk in the Caribbean, according to experts in disaster risk management.

The heavily populated coast of Guadeloupe will have little warning if a tsunami is triggered by the collapse of a volcano on the nearby island of Dominica.

A team of geologists, led by Dr Richard Teeuw from the University of Portsmouth, have discovered that a flank of the volcano Morne aux Diables ("Devils' Peak") shows signs of collapse and if so, a million-ton chunk of rock could crash into the sea, producing tsunami waves up to almost 3 metres (10 feet) high.

Such a rock fall could also weaken three million tones of rock upslope, potentially resulting in much larger landslides and waves of up to five metres. 

Dr Teeuw said: "It's not a case of if this landslide and tsunami will happen, but when. The trigger will probably be a major earthquake, occurring after the heavy rain and coastal erosion of the hurricane season.  It could happen in a hundred years or it could happen next week.