Yellow weather warnings as nearly one month’s rainfall to drench regions in just a few hours today
Yellow weather warnings have been issued as parts of the UK may be drenched in heavy downpours over the coming days, the Met Office said.
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The Met office issued yellow weather warnings as some regions might face flooding, travel delays and even potential power outages.
Parts of Wales are expected to see the worst of the weather on Wednesday, as wet and windy conditions are set to continue with alerts for rain put in place.
Some areas in Wales - mostly the southwestern coast including Swansea, Cardiff and Bridgend - will see up to 70mm of rainfall in a short period today.
Typically, the areas surrounding Swansea including Bannau Brycheiniog National Park (Brecon Beacons) see around 75mm to 80mm of rainfall across the whole month of September.
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Read more: Yellow warnings issued as wet and windy weather to continue across the UK
It comes after windy weather swept across the country and gusts of up to 80mph were recorded by the Met Office overnight on Sunday.
Forecasters have warned that up to 60mm of rain may fall within six hours in one warning area, which covers north-west Wales including Ceredigion, Conwy, Gwynedd and Powys from from 3am to 12pm on Wednesday.
The second warning, which is in place from 6am to 11pm on Wednesday, covers south and south-west Wales where up to 70mm of rainfall is expected largely on south-west hills with up to 40mm elsewhere, the Met Office said.
Areas affected include Swansea, Carmarthen and parts of Cardiff.
Flooding of some homes and businesses is possible within those regions, as well as some disruption to public transport and a chance of interruption to power supplies, the weather service added.
In an online forecast, Met Office meteorologist Alex Deakin said the outlook for Tuesday was "a lot calmer" compared to Monday's breezy conditions but "more wet and windy weather" was expected across the country on Tuesday evening.
Some "scattered showers" are forecast for Wales, South West England and northern Scotland in the afternoon, while much of eastern Scotland and central and eastern England will see a "dry and fine" day, Mr Deakin added.
Highs of around 19C are expected in London, 16C in Manchester and 15C in Glasgow.
A blustery but mild afternoon is on the cards for many
— Met Office (@metoffice) September 17, 2025
Spells of rain continuing, persistent and locally heavy across South Wales ☔
But some brighter breaks will emerge across Northern Ireland, then later for northern England and southern Scotland ⛅ pic.twitter.com/35UqOhFfuV
Mr Deakin said of Tuesday's forecast: "The wind's a lot lighter than yesterday as well and with the help of a bit of sunshine, that will make it feel a little warmer, 19, maybe 20 degrees across the South East, generally 16, 17, 18, so about average for the time of year.
"But as I mentioned, more wet and windy weather is on the way.
"Things are clouding over this afternoon for South Wales, South West England, rain edging in here through the evening, rush hour and that rain spreads to most of Wales and Northern Ireland.
"Before midnight, some heavy outbreaks as well, particularly for Wales and Northern England through the early hours."
He added: "Northern Scotland may stay largely dry, and as the winds ease, we could see those temperatures again, dipping down into single digits, but for most, as the wet and windy weather moves in, it will actually turn mild through the night as we start Wednesday morning, 13, 14 degrees along the south coast."
Rain is expected on Wednesday morning, with the heaviest showers expected in parts of Wales, the Midlands and northern England, the forecaster said.
South East England may not see much rainfall, while southern Scotland, Northern Ireland and northern England should be brighter with some sunny spells throughout the day and highs of 22C possible in eastern areas, he added.
Met Office spokeswoman Andrea Bishop said: "The rest of the week continues on an unsettled note, with the potential for some quite heavy and prolonged rain, along with strong winds in places, over the weekend."
RAC breakdown spokeswoman Alice Simpson said: "As the autumnal weather is expected to worsen on Wednesday, drivers may be hit by delays and even flooding in some areas.
"Standing surface water may look harmless, but attempting to drive through it is incredibly risky, especially if it's not clear how deep it is. As well as posing a safety hazard, floodwater can also lead to expensive vehicle damage or even an insurance write-off.
"If you're not absolute sure the water is shallow enough to drive through safely, the best solution is always to turn around and find another route."