From the article:
"Unfortunately, most media are driven by sensationalism and report about it as if there was strong evidence that such a partial collapse of La Palma could occur in the somewhat near future - including potential horror scenarios such as mega-tsunamis devastating the east coast of the US. Fortunately, there is no scientific evidence to support this picture. Like with other catastrophic events in nature (large asteroid impacts, super-volcano eruptions etc), they are first of all, extremely rare.
There is little to prevent them from happening, little to do against them, relatively little known about them, but from a pragmatic point of view, there is no reason to worry about them more than a 100 years ago, and currently no reason to believe we're in for one in the foreseeable future."