Parts of the UK are braced for gale force winds and heavy rain as Storm Debi hits the country.
The storm is set to reach northern England and parts of north Wales in the morning, with gusts of up to 80mph possible along coastal areas.
There is also a possible danger to life from flying debris and large waves.
Debi, the fourth named storm of the season, could also bring flooding, travel delays and power cuts to many parts of the UK.
The rain and winds are expected to gradually ease off in the afternoon.
The storm developed in the Republic of Ireland, where red weather warnings are in place and around100,000 customers have lost power, according to local media.
In Northern Ireland, roads are closed and there is disruption to the public transport network. NIE Networks said about 3,000 customers were without power, mainly around Craigavon, Newry and Downpatrick.
The Met Office has issued amber warnings for wind in Counties Armagh and Down in south-west Northern Ireland until 12:00 and parts of north-west England, including Cumbria, Lancashire and Merseyside, from 10:00 to 16:00.
Yellow weather warnings for wind are also in place from until 18:00 for much of northern England and Wales, in areas including Manchester, Sheffield, Liverpool, Bangor and St Davids.
Gusts of up to 77mph (124km/h) have battered parts of the Welsh coast.
A warning for rain between 10:00 and 21:00 has also been issued for parts of north-east Scotland which were hit by Storm Babet last month, including Inverness, and Brechin in Angus, where hundreds of homes had to be evacuated after the river South Esk breached its banks.
OceanNewsUK Weather's Simon King said Storm Debi has already brought heavy rain to some areas and could lead to some localised flooding, especially in Northern Ireland and eastern Scotland.
He said the stormy conditions will be especially felt around Irish Sea coasts and there may be branches or trees down and potentially damage to buildings. Cross Irish Sea ferries are also likely to be cancelled or severely disrupted with other travel delays elsewhere.
The Met Office said severe weather could lead to the flooding of homes and businesses - with possible fast-flowing or deep floodwater causing a danger to life.
Spray and flooding could also lead to difficult travel conditions, with some road and bridge closures, and disruption to rail, air and ferry services.
The Met said mobile phone coverage could also be affected and injuries and danger to life could occur from large waves and beach material being thrown onto sea fronts, coastal and road properties.
Two red weather warnings for wind have been issued for parts of the Republic of Ireland on Monday morning, including for Dublin, Clare, Kerry, Limerick, east Galway, south Roscommon, Offaly and Westmeath, due to the risk of danger to life.
The Irish Meteorological Service, Met Éireann, has issued a yellow warning for every county in the country until mid-afternoon on Monday,
Storm Debi is then expected to move through into the North Sea on Monday evening.
It comes after Storm Ciarán caused flooding and disruption across the Channel Islands and southern England - with power cuts, travel problems and hundreds of schools closed.
Another recent storm, Babet, flooded nearly 600 properties in Lincolnshire.
Experts say a warming atmosphere increases the chance of intense rainfall and storms.
However, many factors contribute to extreme weather and it takes time for scientists to calculate how much impact climate change has had on particular events - if any.
The world has already warmed by about 1.1C since the industrial era began and temperatures will keep rising unless governments around the world make steep cuts to emissions.
