Rain and strong gales will continue to batter Britain after a stormy night which saw winds reach 100mph.
The Scottish Borders saw roads flooded last month after storms
Forecasters said conditions would improve slightly but southern Scotland, Northern Ireland and north-west England could see severe winds.
People in Scotland have been warned to prepare for flooding with localised flooding possible across Britain.
A 47-year-old man died after being hit by a wave at Ardglass harbour in County Down, Northern Ireland.
Overnight the south west of England was the worst affected area with winds leaving a trail of damage.
Forecasters said showers would continue to fall on Sunday across Britain with severe winds likely in some areas.
A BBC Weather Centre forecaster said: "High winds are likely of up to around 80mph on Sunday. They are likely to hit Northern Ireland in the morning, north-west England in the afternoon and southern Scotland in the evening.
"It will be a wet and blustery day in most parts of the country. But the south has seen off the worst of it."
Northern Ireland saw road closures after storms in September
The Scottish Environment Protection Agency (SEPA) is urging people across Scotland to be prepared for the possibility of flooding.
The areas most likely to be affected by the rain are western Highland region, west Perth and Kinross, Stirling, Argyll and Bute and Dumfries and Galloway.
The Met Office issued a weather warning on Saturday and said between 25 and 50mm of rain could fall over the next few days, with totals of 75mm possible.
This in addition to the rain that has fallen over the past week could result in some localised flooding, forecasters said.
Dover Coastguard said conditions for vessels in the English Channel were "horrendous" with boats reduced to "walking speed".
Overnight the south-west of England saw a number of road closures after being battered by strong winds.
The Tamar bridge on the Devon and Cornwall border at Plymouth was closed to high-sided vehicles for much of the night.
At Knowle, near Budleigh Salterton in east Devon, around a kilometre of overhead power cables crashed into the road just before 0100 GMT.
Devon and Cornwall police said there were many reports of localised flooding and some structural damage to buildings.
Brixham Coastguard, in Devon, said winds touched hurricane speed on Sunday morning, causing "mayhem" for small craft owners and sinking two vessels.
Elsewhere hundreds of homes in the Nottinghamshire villages of Sibthorpe and Elkesley were left without electricity when cables were brought down. Power has now been restored.
The storms in Northern Ireland have left about 1,000 homes without electricity and caused severe flooding in some areas.
At least 12,000 premises in the West Midlands have been left without power after high winds brought down electricity poles.
Up to 12,000 homes are still without power in Gloucestershire, according to Central Networks.
Have the storms caused any damage where you live? If you have any pictures of the stormy weather, you can send them to email@example.com or send them via text message to 07725 100 100.