Heavy rain for much of the south could lead to flooding, leaving businesses and homes at risk of damage, forecasters have warned.
A yellow weather warning has been put in place for thunder for London and much of England and parts of Wales right through until 5am on Monday, the Met Office has said.
Throughout Sunday and into Monday morning, the Met Office said there could be the possibility of “difficult driving conditions” and possible flooding in some areas.
A warning on the Met Office’s website added: “There is a small chance that homes and businesses could be flooded quickly, with damage to some buildings from floodwater, lightning strikes, hail or strong winds.”
Although there will be heavy rain throughout Sunday, temperatures will hit a high of 18C on Sunday in London.
Heavy and thundery rain will gradually move northwards across England and Wales on Sunday morning, so do take care if you are out and about
— Met Office (@metoffice) October 22, 2022
It will also be rather damp across the far north of Scotland, but some sunshine developing elsewhereStay #WeatherAware⚠️ pic.twitter.com/REXNv1pEBt
Those reasonably high temperatures will remain on Monday in the capital, although wet conditions will remain in the morning across the capital.
The warning adds that transport could also be affected, including potential road closures and train cancellations.
“There is a weather warning that’s going out from 4am (Sunday) until 5am on Monday, the risk is mostly Central and southern England,” said Met Office Meteorologist Rebecca Hudson.
“It’s almost in a sort of triangular shape. So it goes from East Yorkshire roughly down to the Cardiff area, East Devon, to London as well, and East Anglia.”
Before adding: “The heavier band moves through Sunday morning and then weaken out into the afternoon but then there are some further heavy showers in the evening on Sunday.
“And then as we go in overnight, things will gradually dry out into Monday morning.
“There will be some heavier showers overnight on Sunday into Monday, but these will gradually weaken and then Monday will be a lot drier with some sunny spells around as well.”