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.
Professional surfer Alastair Mennie braves the conditions as he catches a wave in Ballycastle, Northern IrelandCharles McQuillan/Getty ImagesA man walks past debris thrown onto a road by the sea during stormy weather in Portrush, Northern IrelandPaul Faith/AFPLarge waves batter the harbour wall in Portstewart, Northern IrelandPaul Faith/AFPA children's playground is flooded by the sea during stormy weather in Portstewart, Northern IrelandPaul Faith/AFPWaves flood a children's play park in Portstewart, Northern IrelandCathal McNaughton/ReutersA driver stops as waves crash over Seaview Road in Saltcoats, ScotlandJeff J Mitchell/Getty ImagesA train passes through Saltcoats in Scotland as waves crash over the sea wallJeff J Mitchell/Getty ImagesA woman struggles in poor weather conditions in Troon, ScotlandJeff J Mitchell/Getty ImagesWaves crash against the promenade wall in Prestwick, ScotlandJeff J Mitchell/Getty ImagesPeople are caught by the spray from big waves in BlackpoolNigel Roddis/Getty ImagesA dog named Ted runs along the beach during high winds in BlackpoolNigel Roddis/Getty ImagesLarge waves crash over the harbour wall in the town of Whitehaven in Cumbria, northwestern EnglandOli Scarff/AFP