Londoners could face the threat of floods and even power cuts with the Met Office warning of 24 hours of near-constant heavy rain.
Forecasters say heavy and prolonged rain is expected throughout Friday and early into Saturday morning, bringing likely disruption to London and the south of the country.
A yellow rain warning has been issued from Friday at 6am until the same time on Saturday with more unsettled weather expected across the country.
The Met Office has forecast constant rain during that period in London, warning of surface flooding and travel disruption.
⚠️ Yellow weather warning issued ⚠️
— Met Office (@metoffice) November 12, 2025
Rain across parts of England and Wales
Friday 0600 – Saturday 0600
Latest info 👉 https://t.co/QwDLMfRBfs
Stay #WeatherAware⚠️ pic.twitter.com/rLEdRcx6OW
The Met says 30-50mm of rain are expected widely, with some places receiving 60-80 mm.
London received an average of 60-70mm of rain in November.
More than 100mm could fall over hills in southeast Wales.
There is a slight chance the rainfall could create power cuts and some buildings may be damaged by the wet weather.
The rainfall is also expected to create difficult driving conditions, forcing roads to close. Train and bus services may also be cancelled or delayed.
Temperatures have been unusually mild for the time of year so far this month, staying firmly in the double digits, but are expected to plunge next week.
Met Office Chief Forecaster, Neil Armstrong, explained: “Low pressure is dominating our weather this week, with multiple warnings in force and more unsettled weather to come.
“We have recently updated the yellow warnings for southwest England and southern Wales to cater for the rain and wind that continues into Wednesday.
“There are increased sensitivities now compared to earlier in the autumn due to recent heavy rainfall events, so we are keeping a close eye on already saturated ground as this could lead to some flooding.
“Difficult travelling conditions are also expected, with delays and the increased possibility of accidents.”
