Well, it’s not a high tech sensor system, but it’s something:
KHAO LAK, Thailand (Reuters) - Agitated elephants felt the tsunami coming, and their sensitivity saved about a dozen foreign tourists from the fate of thousands killed by the giant waves.
And here’s a former co-worker (and friend) in Phuket several years ago:
I’ve read/heard that the vast majority of corpses in the disaster areas are human… local fauna was sensitive enough to know what was coming and smart enough to split for high ground.