Torrential downpours have led to disruption on the road network this evening
Major roads including the M4 and A470 have been hit by “severe flooding” on Tuesday evening following torrential downpours. Pictures and videos show vehicles struggling to navigate standing water on the road surface on the M4 at Neath Port Talbot and at Coryton roundabout in Cardiff.
One lane is closed on the M4 eastbound between junctions 43 at Llandarcy and 42 at Briton Ferry. Traffic is reportedly coping well. Part of the road is also blocked on the roundabout at Coryton which is also affecting the A470 Northern Avenue heading southbound.
The AA is reporting the flooding at Coryton is at the top of the westbound entry slip road, meaning you can’t go all the way around the roundabout.
South Wales Police said on Tuesday evening that the force had also received reports of further severe flooding on the A470 at Upper Boat in Pontypridd heading north towards Merthyr Tydfil.
One eyewitness described the amount of standing water in the area as “dangerous”.
The force said lane one and the hard shoulder are completely flooded which is causing tailbacks on Tuesday evening. Traffic Wales warned drivers to “take care and drive safe”.
A Met Office yellow weather warning for rain has been in place since 12pm on Tuesday and will remain in force until at least noon on Wednesday.
The Met Office advised there could be transport disruption, flooding of homes and businesses and a chance of power cuts.
The forecaster added spray and flooding on roads could make journey times longer and there may be delays on bus and train services.
By the end of Wednesday as much as 75mm was expected to have fallen in some areas of west Wales over 48 hours – about the same as the average for the whole of April.
The Met Office forecast for Wales for Tuesday evening and into the night reads: “Further rain, heavy at times, continuing to move steadily north and east overnight, with the risk of thunderstorms in the east.
“The rain gradually easing for most by dawn. Windy, especially along exposed coasts and hills. A milder night. Minimum temperature 5C.”
The Wednesday forecast reads: “Cloud and rain, locally heavy, will continue to move steadily northwards during the day.
“Becoming drier and brighter in the south, with some sunny spells. Windy and rather cool. Maximum temperature 13C.” Get daily breaking news updates on your phone by joining our WhatsApp community here.