Gale force winds and huge waves are pounding north-western parts of Britain as an explosive cyclogenesis or "weather bomb" hits the country.
Scotland is expected to bear the brunt of the storm, with ferry and train services already cancelled. Lightning strikes led to power cuts in the Western isles.
Amber weather warnings have been put in place in Orkney & Shetland, the Highlands and Northern Ireland. The storm should ease off from Thursday.