Two people have died and one person is seriously injured after Storm Isha battered the UK with gusts of up to 99mph.
Tens of thousands of homes across the country are still without power.
A driver is in a critical condition after two cars hit a tree on a road in Northumberland, police said.
The 26-year-old man who was driving a BMW 3 Series 335d was taken to hospital with life-threatening injuries after he hit a tree in the town of Cramlington on Monday.
Northumbria Police said a Volkswagen Jetta had separately crashed into the tree, but the driver was uninjured.
The force said the reason for the crashes has not been established and the road is expected to remain closed in both directions until Tuesday.
Transport services largely recovered on Monday though some roads remained closed and rail lines blocked, while dozens of schools were shut.
The next storm due to hit the UK and Ireland has been named Storm Jocelyn, which is expected to cause strong winds from Tuesday night into Wednesday morning.
ScotRail services across Scotland will be suspended from 7pm on Tuesday and there will be no rush-hour services the following morning, the railway operator has said.
An 84-year-old man died during Storm Isha after the car in which he was a front seat passenger crashed into a fallen tree in Grangemouth, Falkirk, Police Scotland said.
The incident happened on the A905 Beancross Road at around 11.45pm during an amber weather warning issued by the UK’s Met Office which covered the whole country.
A man in his 60s was killed in a crash involving two vans and a fallen tree in Limavady, Co Londonderry, on Sunday night, the Police Service of Northern Ireland said.
The man who died was driving a Vauxhall Vivaro van in Broad Road at around 9.45pm on Sunday.
The UK Met Office issued an amber warning for wind covering western and northern Scotland from 6pm on Tuesday until 8am on Wednesday.
Less serious yellow warnings were issued for wind across much of the UK north of Oxford and Peterborough, and for rain in an area of western Scotland stretching from the border with England to near Inverness.
The Energy Networks Association said 24,000 people in some parts of Great Britain are without power, mainly in the north of England and in Scotland.
In Northern Ireland, 15,000 customers are without power.
Some 370,000 customers have been reconnected, with about 5,000 field staff and technicians working to fix the damage.
But some people will be without power overnight, the association said.
Fallen trees affected transport, with Traffic Scotland reporting stretches of the M9 and M74 among the roads closed, while the A1 southbound was blocked at Thorntonloch because of an overturned lorry.
High winds forced the closure of the Tay Road Bridge, M48 Severn Bridge and the A66 in Durham and Cumbria between the A1(M) and the M6, while the Humber Bridge, A19 Tees Flyover and A628 Woodhead Pass in Derbyshire were among stretches closed to high-sided vehicles.
A number of people were rescued by firefighters from flooded roads in the Yorkshire Dales.
North Yorkshire Fire and Rescue said crews were sent to Morton Bridge, at Morton-on-Swale, in the early hours of Monday morning and helped the occupants from four trapped vehicles.
One woman who was rescued, Charlie Curry, told ITV Calendar News: “It was definitely a terrifying experience at the time.
“But I made it out alive and everyone’s all right. Just let’s see how the van’s doing.”
Fallen trees and flooding caused ScotRail to suspend all services from 7pm on Sunday until around 11am on Monday when some lines reopened.
A Network Rail spokesman “hundreds of engineers” were deployed with chainsaws and cherry pickers to remove debris from tracks.
Most routes in England and Wales were open on Monday but with some residual delays.
Strong winds, showers, heavy rain and sunny spells… there is lots on offer with the weather this week ⚠️
Find out more below 👇 pic.twitter.com/gG8DtvJMNX
— Met Office (@metoffice) January 22, 2024
The Met Office said the highest recorded wind speed during Storm Isha was 99mph at Brizlee Wood in Northumberland, with gusts of 90mph at Capel Curig in Snowdonia on Sunday.
A rare red warning for wind in north-east Scotland was in place until 5am on Monday, with amber warnings covering much of the UK until 6am and further yellow warnings covering the entire country until noon.
Heavy downpours battered some places, with 28 flood warnings in place in England and 50 in Scotland.
The Met Office said Storm Isha, the ninth named storm to hit the UK since the season began in September, moved away from the UK on Monday but conditions remained windy with a mixture of sunny spells and scattered showers.