Parts of the UK will suffer further thunderstorms and torrential downpours after flash flooding caused disruption to parts of southern England.
The Met Office has issued a yellow thunderstorm warning covering the whole of Wales, southern England and parts of the north following days of unsettled weather conditions.
But the Met Office warned of potential further heavy rain, which could see up to 1.6in (40mm) falling within in an hour in some areas.
Nicola Maxey, a spokeswoman for the Met Office, said: "If you're caught by a thunderstorm, you're likely to see 20mm-40mm (0.8in-1.6in) of rain within the hour, and some areas could see 50mm-70mm (2in-2.8in) within three to four hours.
"Really, anywhere within the warning area is at risk of those storms."
The Environment Agency has also issued a number of flood alerts for parts of the Midlands around Birmingham.
The warning comes after visitors were told to avoid Sheringham beach in Norfolk after storm water began overflowing on to the beach on Sunday.
North Norfolk District Council tweeted: "We are aware of storm water overflow on the beach in Sheringham and are working with Anglian Water and RNLI Lifeguards.
"We ask that you avoid accessing the beach in the area at this time."
Roads were closed in the area due to bad weather, while Norfolk Police warned of "very poor" driving conditions on the A11 on Sunday evening due to flooding and heavy rain.
Amid unsettled conditions, a huge funnel cloud appeared over the Bristol Channel, which appeared to create a spray from the sea and was visible for around 15 minutes, according to onlookers.
The M11 northbound was forced to close between Junction 7 and Junction 8 at Stansted due to severe flooding.
Elsewhere, Northamptonshire Fire and Rescue Service said on Twitter that it had removed approximately 8,000 litres of flood water from the basement of Wellingborough Museum.
Following a series of weather warnings for parts of the UK, a yellow thunderstorm warning has been issued covering a large area of Scotland for Tuesday afternoon.
Heavy showers could lead to properties being flooded, while there is a chance roads could be closed due to rain lashing the area, the Met Office said.
Sunshine and showers are expected across the UK during the week but rainfall will be more sustained, with the potential for 0.8in (20mm) falling over six hours.
Ms Maxey added that temperatures are closer to average compared with last week's scorching conditions, with south-east England "significantly cooler" with highs of up to 25C (77F) on Monday.
"As we go through the week, we're looking at those mid-20s for the south-east and, as we go further north, towards Manchester, it will be 22C, 23C, so the low 20s the further north you go," she said.
"This is closer to average as we're heading towards autumn, so not that unusual."
