A $40 million superyacht called the Bayesian sank off the coast of Sicily, but the exact cause is unknown. The New York Times illustrated the possibilities:
Reports immediately after the disaster raised the possibility that the Bayesian had been hit by a tornado-like disturbance called a waterspout, but the authorities don’t think that happened. Still, the wind was doing something dangerous: It was changing direction.
According to a nearby weather station, it was blowing west-southwest then southwest, then north-northwest. This increased the chances of getting ambushed by a random gust that could slam into the side of a boat, which can tilt even a big vessel.