Forecasters have issued a severe 'danger to life' warning for large parts of Wales, with up to a month's rainfall expected to deluge the region within just 24 hours. The Met Office's amber alert, highlighting the risk of fast-flowing floodwater and significant disruption, has been extended for most of South Wales until 11.59pm on Monday, 1st December 2025.
Widespread Disruption and Flooding Risk
The amber weather warning states that heavy rain is likely to bring probable flooding and serious disruption. Officials warn that fast-flowing or deep floodwater could pose a direct danger to life. Alongside the amber alert for South Wales, yellow rain warnings for possible disruption are in place for parts of England and Wales from the early hours of Monday until 3am on Tuesday, and for much of southwest Scotland throughout Monday.
Meteorologists predict that the highest ground in the amber zone could see a staggering 120mm (4.7 inches) of rain. Between 20mm and 40mm is expected widely, with hilly areas likely to receive up to 80mm. The British Geological Survey has cautioned that this volume of rainfall has triggered landslides in Wales in the past.
Saturated Ground Exacerbates Threat
The impact of Monday's deluge is expected to be severe because the ground is already saturated from weeks of above-average rainfall. A Met Office meteorologist noted that Wales has already seen around 240mm of rain this November, significantly more than the monthly average of 162mm. Combined, England and Wales have experienced 143% of their normal rainfall for the period.
Senior operational meteorologist Marco Petagna emphasised the severity, stating Monday could be a 'significant event for many'. He warned of potential flooding, landslides, and strong south to southwesterly winds, with gales possible around coasts and over high ground. The conditions could lead to flooded homes and businesses, transport cancellations, power cuts, and communities being cut off by flooded roads.
Flood Alerts and Warnings Issued
In response to the forecast, environmental agencies have activated numerous warnings. Natural Resources Wales (NRW) has listed 34 flood alerts in southern parts of the country, urging people to be prepared. Richard Preece, NRW's duty tactical manager, said: "With some rivers already swollen and the ground saturated, we expect to see a number of flood alerts and warnings issued."
Meanwhile, the Environment Agency has posted three flood warnings, meaning flooding is expected, and 42 alerts indicating that flooding is possible across affected areas. Residents are advised to stay informed through official channels and avoid unnecessary travel.
