Three people have been killed on roads as Storm Eunice hits the UK
A woman in her 30s has died in north London, a man in his 50s has died in Merseyside and a man in his 20s has died in Hampshire
Several other people have been injured by falling trees and flying debris, while another man has died in the Republic of Ireland
About 200,000 homes are without power across the UK, according to Environment Secretary George Eustice
It has brought widespread travel disruption with hundreds of trains and flights cancelled
In London, parts of the O2 Arena's roof have been shredded
A wind gust of 122mph at the Needles on the Isle of Wight is provisionally the highest gust ever recorded in England
An amber warning for wind is in place across the Midlands, southern England and Wales until 21:00 GMT
There are yellow warnings for snow, ice and wind in Northern Ireland and Scotland
It is expected the Severn Bridge will close as a precaution
Cornwall, Somerset and Gloucestershire have declared emergencies ahead of the storm.
Residents are being advised not to travel unless absolutely necessary, and to stay away from exposed coastal areas.
Image source, Met OfficeThe most serious red weather warning is in place for the coastline of north Devon, north Cornwall and Somerset as well as the south coast of Wales.
Amber warnings, the second highest alert level, for wind are in place across the whole of England from 05:00 GMT to 21:00 on Friday.
Yellow weather warnings, the next level down, for wind and snow are in force for a large part of Scotland – where blizzards are predicted – and the whole of Northern Ireland.
Severe and significant flooding may also take place along the coastlines of the south and west of England as spring tides are expected on Friday morning.
The Environment Agency has issued 10 severe flood warnings, meaning that there is danger to life, along the River Severn near Gloucestershire, South Wales and Somerset, and 25 flood warnings across the South West, meaning flooding is expected.
It has also issued 91 flood alerts, meaning that flooding is likely, across England.
All schools in north Wales will close tomorrow as the region braces for Storm Eunice, it's been announced.
That includes schools in Anglesey, Gwynedd, Conwy, Denbighshire, Flintshire and Wrexham.
Flintshire County Council said the move was recommended to "protect life and minimise harm".
Image source, Getty ImagesSwansea, Cardiff and Vale, Cwm Taf Morgannwg and Aneurin Bevan University Health Boards have announced all coronavirus vaccination centres will be closed on Friday due to Storm Eunice.
Appointments will be rescheduled.
All areas are affected by the red warning issued by the Met Office.
Drivers are being told not to set out during Storm Eunice unless it cannot be avoided.
RAC Breakdown spokesman Rod Dennis says that with a red weather warning in place in south Wales and south England "safety on the roads will be paramount".
"It might be better to make trips today or delay them until the worst of the storm has passed," he says.
"Drivers who make unnecessary journeys risk putting themselves and their passengers in danger, as well as the lives of anyone who may need to help them should something unwanted happen."
Elsewhere in the UK he says there may be snow and strong winds which he says is a "dangerous combination" and potentially "extremely hazardous".
Image source, PA MediaThe London Eye is among the attractions to close due to Storm Eunice
Hundreds of attractions, including zoos, houses and gardens have announced they are closing on Friday due to Storm Eunice.
Among those to have announced closures for Friday are:
What does a red weather warning mean?
BBC Weather's Nick Miller explains what the UK's highest-level weather warning means.
Image source, PA MediaThe Prince of Wales has cancelled a visit to Newport and Swansea "due to the dangers posed by Storm Eunice".
Clarence House said that "in the interests of public safety" the engagements would be postponed, with a view to rescheduling them.
It was due to be his second public appearance after recovering from Covid, which he caught for a second time last week.
Katy Austin
Business Correspondent
Image source, Getty ImagesA plane takes off at Gatwick (file picture)
Some airports are warning Storm Eunice could affect flights tomorrow.
Gatwick Airport says it is possible flights could be disrupted, as could its North terminal shuttle service, between approximately 10:00 GMT and 16:00.
Passengers should arrive early, it adds.
Manchester Airport is advising passengers to check with their airlines for the most up to date information, and allow plenty of time to get to the airport.
Image source, Getty ImagesSome schools in Wales, England and the Republic of Ireland are to close on Friday due to Storm Eunice.
Most schools in the south of Wales have said they will be shut for the day.
Further announcements from local authorities are expected but so far Rhondda Cynon Taf, Bridgend, Swansea, Powys, Ceredigion, Caerphilly, Pembrokeshire, Denbighshire, Anglesey, Gwynedd, Neath Port Talbot, Monmouthshire and Cardiff councils have announced closures.
And all schools in the Somerset County Council area in England will also be closed. That's across early years, primary, secondary and sixth form colleges.
More than a hundred schools across Devon and Cornwall will also shut and Bristol City Council said it has advised schools not to open.
Schools and colleges in Cork, Kerry, Clare, Waterford, Mayo, Sligo, Leitrim, Donegal and Roscommon in Ireland will also be closed, with a red weather warning issued for Cork, Clare, Kerry and Waterford.
All rail services in Wales will be suspended for all of Friday, with disruption expected to continue into the weekend.
Due to the level of extreme weather expected, rail replacement services will not be operating.
Transport for Wales is allowing passengers with tickets for Friday to travel today instead if they can, or over the weekend if services have resumed by then.
Ferries between Fishguard and Rosslare have been cancelled from 23:45 GMT on Thursday.
Simon King
BBC weather presenter and meteorologist
Storm Eunice is set to bring widespread disruption with damaging and dangerous winds throughout Friday.
It will be one of the most significant storms to hit the UK in many years.
Eunice will start bringing impacts early Friday morning with particular concern around the Bristol Channel, where the Met Office red warning is in force for.
Strong winds combined with a spring tide will make conditions dangerous.
Throughout the day we should be prepared for trees being uprooted, power cuts with significant travel disruption of delays and cancellations.
Storm Eunice will clear late on Friday but it will stay unsettled over the weekend with further rain and strong winds at times.
The wind strengths forecast for southern parts of the UK are comparable to the Burns' Day Storm of January 1990, external, which caused widespread damage, and the storms that hit the UK during the winter of 2013-2014.
Image source, Met Office
Image source, PAThe government held an emergency Cobra meeting to discuss the response to the incoming storm.
Prime Minister Boris Johnson says the Army is on standby to help those affected - and that help is also being offered to those hit by Storm Dudley in recent days.
Speaking on a visit to RAF Waddington in Lincolnshire, he says: “My sympathies to those who are still without power – we are working with the power companies, the local authorities to get their juice restored as fast as possible.
“But of course, the Army is on standby.”
Here are the areas set to be affected by Storm Eunice.
The red warning - the highest there is - is in place from 07:00 GMT until 12:00 on Friday for parts of south Wales and the coast of south-west England.
A lower amber warning for wind remains in place for the rest of Wales and most of England as far north as Manchester as well, from 05:00 until 21:00 on Friday.
Image source, PA MediaWelcome to our live page coverage of Storm Eunice, as a red weather warning has been issued for parts of south-west England and south Wales for Friday.
The Met Office warned Storm Eunice could bring gusts of up to 90mph, causing significant disruption.
It said there could be a “danger to life” as a result of extremely strong winds.
Train passengers have been urged not to travel on Friday.
More than 100 schools in Devon, Cornwall, Somerset and Wales are closing on Friday due to the storm.
The prime minister has confirmed the army is on standby to deal with the consequences of the storm.
Schools across the Republic of Ireland are also due to shut, with a similar red weather warning in place in Cork and Kerry.