The Met Office has warned of a possible danger to life as Storm Arwen batters Wales.

High winds overnight have seen all train lines blocked on Saturday morning between Cardiff and Swansea due to a fallen tree, while there are closures on routes including the M4 and the M48 Severn Bridge.

The Met Office's amber warning for wind covers much of west Wales and north-west Wales, including Tenby, Haverfordwest and Bangor, but this alert is due to end at 9am. The warning says flying debris is "likely and could lead to injuries or danger to life".

A primary school headteacher has been killed in Northern Ireland when a tree fell on his car and a second man was killed by a falling tree in Cumbria.

Read next:Storm Arwen amber warning live updates: M4, Severn Bridge, major roads hit by closures as fierce winds batter wales

A less severe yellow warning for wind is set to be in place across all of Wales from 9am until 6pm. Wind speeds are forecast to peak at 50mph in Swansea at 11am, 47mph in Cardiff at the same time and 46mph in Bangor at 10am.

In its yellow alert, the Met Office says: "Injuries and danger to life from flying debris are possible. Some damage to trees, temporary structures and buildings, such as tiles blown from roofs, could happen.

"Road, rail, air and ferry services may be affected, with longer journey times and cancellations possible. Some roads and bridges may close.

Met Office warnings for Wales on November 27
Met Office warnings for Wales on Saturday, November 27

"Power cuts may occur, with the potential to affect other services, such as mobile phone coverage. Injuries and danger to life could occur from large waves and beach material being thrown onto sea fronts, coastal roads and properties."

The forecaster expects the "feels like" temperature to be as low as -2C in both Cardiff and Swansea on Saturday, dropping to -3C in Powys.

Giving its outlook for Saturday in Wales, the Met Office says: "Severe gales gradually easing, but feeling very cold today. A very windy start, with severe gales, especially in coastal areas.

"Remaining windy into the afternoon, but the strongest gusts abating somewhat. Plenty of showers initially, wintry at times, these becoming more confined to coastal areas later. Feeling very cold. Maximum temperature 6C.

"Tonight: some coastal showers persisting across west Wales, otherwise a lot of dry, clear weather to be had. Winds will continue to ease, with a widespread frost developing inland. Minimum temperature -5C.

"Sunday: still some showers running into western coastal areas and perhaps a few later in the north, otherwise after a frosty start, a dry day with lots of sunshine. Lighter winds. Maximum temperature 7C."

You can follow all today's latest Storm Arwen updates including travel disruption here.