CCTV footage posted on Facebook shows the storm that blew through parts of Sicily overnight on Sunday and Monday, before a yacht carrying British tourists capsized off Palermo.
One person died and seven are missing after the British-flagged vessel - named by the coast guard as the Bayesian - capsized and sank at about 5am on Monday 19 August.
The Independent understands that British tech tycoon Mike Lynch is among six people missing after the 56-metre (184-foot) yacht sank.
Footage shows the storm in the village of Santa Nicolicchia.
