Wales is once again bracing for a deluge as four severe weather warnings have been issued for Sunday and Monday, December 14 and 15, 2025. An amber alert—signaling a “possible risk to life”—heads the list, as heavy rain threatens to bring widespread travel disruption, property damage, and significant flooding across the country. The Met Office, Natural Resources Wales (NRW), and local authorities are all sounding the alarm after a string of recent storms left the ground saturated and communities on edge.
According to the BBC, the Met Office has issued separate warnings for north, mid, and south Wales, following in the wake of recent flooding from Storm Bram and the “devastating” impacts of Storm Claudia in Monmouth. The coming rainfall, expected to dump up to 100mm (about 4 inches) in just 24 hours in some areas, is set to fall on already waterlogged terrain, heightening the risk of flash floods and landslides.
“Given the recent wet weather and saturated ground, the likelihood of impacts is higher,” a Met Office spokesperson explained, noting the particular vulnerability of the west and south of Wales. “Over the next 24 to 36 hours, parts of the UK, particularly the west, will see a significant amount of rain. In south and west Wales we could see another 100mm (4in) of rain falling in the next 24 hours or so, and that's falling on saturated ground. We've had a very wet November and start to December. So, travel disruption and possible flooding of businesses and homes over the next day or two could be quite significant.”
The warnings are not just theoretical. On Monday morning, train services between Llandudno Junction and Blaenau Ffestiniog were canceled due to flooding, with disruptions expected to persist throughout the day. Police have urged motorists to avoid the A487 in Nasareth, Gwynedd, where heavy flooding has rendered the road impassable. Meanwhile, the A40 is closed in both directions between Llandovery and Manordeilo because of dangerous surface water, according to BBC reports.
Natural Resources Wales has taken the lead in emergency preparations, warning residents—especially those in south Wales—to brace for potentially significant flooding overnight. As of Monday morning, there are 11 flood warnings and 42 flood alerts in effect across the country. NRW teams are working closely with the Flood Forecasting Centre, emergency responders, and local authorities, constantly monitoring weather forecasts and rainfall predictions.
“We're urging people to be vigilant and to make preparations for potential flooding now,” said Sally Davies, NRW's duty tactical manager. “If flooding is possible in your area, think about preparing a flood kit with any important documents and medication, moving your car to higher ground and moving treasured possessions upstairs or to a higher place.”
The warnings span a broad swath of Wales. The amber warning, which is the most severe, covers much of south Wales from Pembrokeshire to Newport and remains in effect until 9pm on Monday. Multiple yellow warnings—indicating a lower but still significant risk—blanket areas including Blaenau Gwent, Bridgend, Caerphilly, Cardiff, Carmarthenshire, Ceredigion, Merthyr Tydfil, Neath Port Talbot, Pembrokeshire, Powys, Rhondda Cynon Taf, Swansea, and the Vale of Glamorgan, with varying expiry times throughout Monday. Further yellow alerts extend to Ceredigion, Conwy, Denbighshire, Gwynedd, Powys, Flintshire, and Wrexham, reflecting the widespread nature of the threat.
North Wales, in particular, is being hammered by heavy rain and strong winds. According to North Wales Live, two yellow weather warnings for rain are in force, with one starting on Sunday evening and lasting until 3pm Monday. This covers Ceredigion, Conwy, Denbighshire, Gwynedd, and Powys—regions where up to 100mm of rain could fall over 24 hours, especially on higher ground. A second Met Office warning stretches into northwest Wales and even into northwest England, remaining in place until Monday night.
Natural Resources Wales has issued one flood warning and 34 flood alerts in Wales, with the alerts signifying that flooding is possible and preparations should be made, while the warning means flooding is expected and immediate action is required. Specific flood warnings in North Wales include parts of Abererch near Pont Abererch, sections of Beddgelert village along the River Colwyn and River Glaslyn, and Riverside Terrace and the A499 at Pwllheli, where river levels are rising and impacts are ongoing.
Flood alerts also cover a wide range of communities and river systems. These include areas around all rivers on Anglesey, the river Dysynni from Tywyn to Minffordd, agricultural land and isolated properties in the Conwy Valley, parts of Llangefni town, North Gwynedd, the river Conwy from Dolwyddelan to Conwy, and the rivers Glaslyn and Dwyryd from Dyffryn Ardudwy to Nant Gwynant. In all these places, river levels are above normal, and residents are being urged to remain alert and prepared for sudden changes.
For many in Wales, the warnings are all too familiar. The country has endured a string of storms and relentless rainfall in recent weeks, leaving the ground unable to absorb further precipitation. According to the Met Office and NRW, this saturation is what makes the current situation so precarious. Even moderate rainfall can now trigger flooding, landslides, and hazardous driving conditions.
Authorities are urging residents to take practical steps to protect themselves and their property. NRW recommends assembling a flood kit containing essentials such as important documents, medications, and emergency supplies. Moving vehicles to higher ground and relocating cherished possessions upstairs or to safer locations can also reduce the risk of loss or damage. For those living in the most vulnerable areas, signing up for local flood alerts and staying tuned to official updates is strongly advised.
Emergency responders and local councils are on standby, ready to assist where needed. The collaboration between the Met Office, NRW, and partner agencies is aimed at minimizing harm and ensuring that communities receive timely information and support. Yet, officials acknowledge that the situation could escalate quickly, especially in the early hours of the morning when heavy rain is expected to peak.
With the memory of recent floods still fresh—such as those in Monmouth and other hard-hit areas—there is a palpable sense of anxiety across Wales. The coming hours and days will test the resilience of communities, infrastructure, and emergency services as they confront another round of extreme weather. For now, vigilance, preparation, and community spirit remain the watchwords as Wales faces the latest in a series of relentless storms.
