It’s over in a flash! Britain’s fun in the sun is coming to an end as clear skies and 26C heat give way to thunderstorms and torrential rain.

Sunny weather in Britain appears to be over, with the 26C heat replaced by thunderstorms and torrential rain.

Summer storms are expected to continue across the UK this evening, with torrential rain promising a washout after the weekend’s scorching temperatures.

Yellow weather warnings are in place across the UK, including Manchester, Scotland and much of Wales, while the Met Office warns that heavy showers and thunderstorms could lead to disruption and flooding .

Stormy weather, with ‘danger to life’ warnings, is expected to continue until Tuesday and Wednesday, but mainly over southern England and northern Scotland.

As temperatures reached 26C in parts of the UK, Britons should prepare for colder weather over the coming days, with maximum temperatures in the mid-teens.

Hikers don red ponchos for their walk in Builth Wells, Powys, Wales as thunderstorms hit the Welsh coast

Drivers in Manchester faced torrential downpours earlier today while others across the UK made the most of the remaining sunshine.

Residents in Powys have been caught in heavy rain which is expected to spread across the UK this evening and tomorrow as the Met Office warns of thunderstorms across Britain.

Parts of the UK have already been inundated by climate change.

Parts of northern England, including Manchester, were drenched this afternoon as bathers in southern England tanned in the sun.

The UK is set to brace for heavy rain and raincoat dust as wet and windy weather moves eastwards across the UK, flooding Wales and northern England before to move to Scotland.

The sudden change in weather might surprise many, but calmer weather returns from Tuesday with local thundershowers and sunny spells.

Before cooler, wetter weather arrives, the British flocked to parks and beaches across the UK on the ‘hottest day of the year’.

The Met Office has issued three yellow thunderstorm warnings for the majority of Wales, parts of the south west and north west of England, Northern Ireland and Scotland.

But despite weather warnings, Brits headed outside to bathe in high temperatures of 26C (78.8F).

Thunderstorms are expected to hit parts of Wales and England between midday and 10pm today.

COUNTY LAOIS, IRELAND: Residents jump from a bridge into the river in Vicarstown

DORSET: People enjoy the sunny weather on Bournemouth beach this morning

DORSET: A swimmer dives off the Cobb harbor wall into the sea while enjoying the hot sun at the hot springs at the seaside resort of Lyme Regis

Thunderstorms are expected to hit the majority of Wales, parts of the south-west and north-west of England, Northern Ireland and Scotland.

Met Office meteorologist Simon Partridge has predicted that the weather will be even warmer in parts of the UK today.

He added: “The difference (Sunday) is that it probably won’t be as hot in Northern Ireland, Wales or Scotland.

“The really hot air is likely to be confined to southern and eastern parts of England, with temperatures expected to peak in central parts of the country at around 27C.”

Noting that yellow thunderstorm warnings have been issued in several parts of the UK, Mr Partridge said heavier rainfall was expected.

People living in areas with a yellow warning should expect some disruption, particularly to travel.

Spray and flash flooding could lead to difficult driving conditions and an increased likelihood of power cuts, the Met Office reports.

It comes shortly after temperatures peaked at 25.9C in Herstmonceux, East Sussex, while Cassley, in the north of Scotland, recorded a searing 25.7C on Saturday .

LONDON: A woman relaxes with headphones in the spring sunshine on Wimbledon Common today

DORSET: A woman relaxing under the shade of a bright orange umbrella in the hot spring sun in the seaside resort of Lyme Regis

DORSET: Hundreds of bathers enjoy the warm weather on Bournemouth beach today

Gogerddan in Wales saw temperatures of 25.1C, while the heat in Northern Ireland reached highs of 23.8C in Magilligan.

Temperatures rose steadily over the week, reaching 24.6C in St James’s Park, London, as thousands of people took advantage of Friday’s warm sunshine.

But many beachgoers in Brighton were shocked when the sea along England’s south coast turned a dirty brown color amid the public.

This comes just a year after the tourism hotspot was named as one of the areas worst affected by sewage dumping.

Hundreds of thousands of Britons also reported seeing the Northern Lights from their windows on Friday evening, thanks to a severe geomagnetic storm that threatens to disrupt global power grids.

Images shared on social media showed large swaths of the country draped in a spectacular light show known as aurora.

Stunning shades of green and purple were captured in the skies over the UK, including Derbyshire, Lincolnshire, Tyne and Wear, Essex, Berkshire and Kent.

Scientists have already expressed concerns that the geomagnetic storm – the first to hit Earth in almost 20 years – has the power to disrupt power grids, mobile networks and GPS satellites.

On Friday, Deputy Chief Meteorologist Tony Wisson said: “Many places will start to be sunny and warm on Sunday, although it will likely become cloudier from the west or southwest during the day.

“This will be accompanied by scattered showers, which could be heavy with thunder.

“On Monday we are likely to see more widespread and longer lasting spells of rain, some of which will be heavy and stormy.

Brown, murky sea water was spotted by bathers in Brighton earlier today, in one of the UK’s worst sewage dumping areas.

MERSEYSIDE: A dog plays with a ball on New Brighton beach on the Wirral on Sunday

MERSEYSIDE: Two women walking their dogs on a Wirral beach on May 12

MERSEYSIDE: Lifeguards set up New Brighton Beach this morning

“It will also make the day feel much fresher.”

Hot weather causes increased UV levels.

Weather conditions are expected to become more unstable again over the next week.

Deputy Chief Meteorologist Dan Harris said: “Heavy showers and thunderstorms are likely on Sunday morning, most likely across south-west England and Wales, but possibly also across the west of Northern Ireland.

“They will move steadily northwards throughout the afternoon, while likely turning into larger rain clusters before leaving Scotland overnight.

“Heavy showers are possible in some places, producing up to 30mm in less than an hour and possibly 40-50mm in two to three hours. Hail, frequent lightning and strong gusts of wind will be additional localized hazards.