It is advised that parents keep their children inside during the heatwave, which will see temperatures soar to 33C by this weekend.

It is predicted that the mercury will reach 28C (82F) in the South East this afternoon. Britons are expected to enjoy their weekends on beaches across England and Wales as the UK begins to heat up.

This temperature is higher than those in holiday hotspots like Mykonos (23C/73.4F), Split (24) and Split (24C/75F).

The sun shining on Saturday is not the only thing that’s going to be hot. It will heat up every day, until Monday sees a record-breaking 32C (89.6F).

The NHS Sheffield Foundations Trust has warned parents that the UK is facing some of the hottest days in a long time. They advise children to stay out of direct sunlight and to wear light clothing.

Keep your child hydrated with plenty of water. They wrote that drinking water is important and should be done slowly.

‘Don’t allow your children to stay in the sun for long periods – and never leave them in a car on a hot day. It is essential to find cool spots and rest in shade. It is important for children to wear as little sunblock as possible when they’re out in the sunshine.

The midday sunshine approaches on Bournemouth Beach where sunseekers are enjoying relaxing under the blue skies this morning

Bournemouth Beach is seeing midday sun, where sunseekers can relax and enjoy the beautiful blue skies.

Temperatures are expected to hit 30C (86F) on Sunday. Pictured, sunseeker on Bournemouth Beach this morning

Sunseekers pictured taking a dip into the water on Bournemouth Beach this morning

With temperatures forecast to reach 30C on Sunday (86F), sunseekers will be in large numbers this weekend.

Bournemouth Beach is pictured this morning, having already packed out with towels, tents and umbrellas to protect people from the scorching hot sun today, which could see temperatures as high as 28C (82.4F) later on

Bournemouth Beach has been pictured in this morning’s photo. People have packed their towels, tents, and umbrellas today to keep them from the scorching heat of today. This could lead to temperatures reaching 28C (82.4F) later.

People traipsed along to Bournemouth Beach (pictured) this morning with families and friends putting down their towels on the sand to enjoy the sunshine on Saturday afternoon

Bournemouth Beach, photographed: Families and friends strolled along this morning.

Bournemouth Beach saw plenty of arrivals this morning to get ahead of an afternoon rush when temperatures reach 28C (82.4F) later on today

Bournemouth Beach had many visitors this morning, allowing them to be ahead of the afternoon rush as temperatures rise to 28C (82.4F) later today

Today's sunshine and warm temperatures are the perfect opportunity for beach and outdoor sports like volleyball (pictured on Bournemouth Beach this morning)

The perfect conditions for outdoor and beach sports such as volleyball are today’s sunny skies and warm temperatures.

‘Even if they’re covered up, make sure they’re covered in a high factor sun cream.’

The first symptoms of an overheated child were also noted by the doctors.

Yesterday’s Level 3 heat-health alert by the UK Health Security Agency was issued. It warned of the imminent heatwave and has increased from the previous Level 2 alert. From 9am Monday to 9am Friday next week, the new warning will be in effect.

The Level 3 alert covers the East of England, South East and London regions – and warns Britons to ‘look out for others, especially older people, young children and babies and those with underlying health conditions’.

Beachgoers enjoy the sunshine at Bournemouth Beach this morning as temperatures in the south of England reach highs of 28C (82.4F) today

Bournemouth Beach is enjoying the sun this morning, as the temperatures reach 28C (82.4F) in south England.

A man relaxes under blue skies at Bournemouth Beach. Temperatures like today's 28C (82.4F) are surpassing holiday hotspots including Mykonos, with 23C (73.4F), and Split, with 24C (75F)

A man relaxes under blue skies at Bournemouth Beach. Today’s temperature of 28C (82.4F), is higher than other holiday spots like Mykonos (23C/73.4F), Split (24) and Split (24C/75F).

A man paddleboards with his dog on the waters at Bournemouth Beach as he enjoys the warm sunshine hitting Britain today

As the sun shines brightly on Britain, a man and his dog paddleboard together at Bournemouth Beach.

Saturday's hot and sunny weather is only the start - with temperatures itching up day by day until we reach a peak on Monday and Tuesday with a scorching 32C (89.6F). A woman is pictured on Bournemouth beach getting ready for a day in the sun

The sun shining on Saturday is just the beginning. Temperatures are rising day by day, until they reach their peak Monday and Tuesday at 32C (89.6F). Bournemouth, England: This is a woman getting ready for the day by the sun.

With one of the longest stretches of piping hot weather ahead, NHS Sheffield Foundations Trust have warned the parents of the UK to not let children run around in the sun, and if they are being exposed, to keep clothing light. People enjoy a walk in the early morning sunshine before 28C (82.4F) hitting the south of England later today

NHS Sheffield Foundations Trust warns parents not to let their children play in the heat. The sun is shining brightly in early morning sunlight, with temperatures of 28C (82.4F) forecast for the south.

People running by the sea at Bournemouth Beach early this morning

People running by the sea at Bournemouth Beach early this morning

The NHS Sheffield Foundations Trust has warned parents that the UK is facing some of the hottest days in a long time. They advise children to stay out of direct sunlight and to wear light clothing. People running along Bournemouth Beach this morning

The UK Health Security Agency issued a Level 3 heat-health alert yesterday, warning ahead of the heatwave, up from the Level 2 alert which had been in place. The new warning runs from 9am next Monday until 9am next Friday. Pictured, women on a run by Bournemouth Beach this morning

Yesterday’s Level 3 heat-health alert by the UK Health Security Agency was issued. It warned of the imminent heatwave and raised the level from yesterday’s Level 2 alert. This new alert runs from Monday, 9 am next Monday to Friday at 9 AM next week. The picture shows women running by Bournemouth Beach today

People are also advised to close the curtains to rooms that open to the sun in order to keep them cooler. Level 3 can be described as “heatwave action” and Level 2 as “alert, readiness”. 

Maarten van Aalst from Red Cross, climate manager said sports days may be changed at schools in the last week before term ends. He added that parents should keep children cool by keeping them in a park or forest.

Met Office meteorologist Greg Dewhurst told MailOnline that the usual advice for heatwaves apply, with the sun being its strongest between 11am and 3pm, avoid the sunshine – both children and adults. It’s better to drink plenty of water, and to be inside during high heat.

People have been preparing for the heat and high UV levels later on today by piling on the suncream at Bournemouth Beach

Many people have started to prepare for high levels of heat and ultraviolet radiation by applying sunscreen at Bournemouth Beach.

One woman on Bournemouth Beach brought her laptop with her to enjoy the sunshine while working 'remotely' from 'home'

Bournemouth Beach woman brought her laptop to take along so she could enjoy the sun while still working remotely from home.

The blue skies at Bournemouth Beach led people to take to the water for some rest bite, with the temperatures expected to reach a high of 28C later on today

People took to Bournemouth Beach to enjoy the blue sky and a bite to eat. The temperatures are expected to rise to 28C by tomorrow. 

People enjoy warm, sunny weather in London's Hyde Park this morning, with some taking to Boris Bikes, as the country experience a heatwave that is set to last for over a week

This morning’s sunny temperatures in London’s Hyde Park are a welcome sight. Some people also ride Boris Bikes as they enjoy the warm weather. The country is currently experiencing a heatwave which will last more than a week.

People in enjoy various sports as they traipse through London's Hyde Park on wheeled boards while holding sticks in the morning sunshine

As they ride their bikes through London’s Hyde Park, people enjoy a variety of sports while still enjoying the early morning sun with sticks.

People taking the opportunity to go for a run in the morning sunshine before the hot 28C (82.4F) temperatures hitting the south later today

People are taking advantage of the warm morning sun to take a run before the heat 28C (82.4F), temperatures hit the south later in today

A man takes the steps into the Serpentine Lido in London's Hyde Park this morning ahead of Britain's scorching 28C (82.4F) high forecaster later on today

One man steps in to the Serpentine Lido at London’s Hyde Park today, ahead of Britain’s hot 28C (82.4F), high forecaster later today

Temperatures are expected to hit 30C (86F) tomorrow, then we are expected to reach a peak on Monday and Tuesday with a scorching 32C (89.6F)

Temperatures are expected to hit 30C (86F) tomorrow, then we are expected to reach a peak on Monday and Tuesday with a scorching 32C (89.6F)

Saturday's hot and sunny weather with highs of 28C (82.4F) is only the start - with temperatures itching up day by day until we reach a peak on Monday and Tuesday with a scorching 32C (89.6F). Pictured, people walking out early before temperatures rise in Dunsden, Oxfordshire, this morning

Saturday’s scorching sun and high temperatures of 28C (82.4F), are just the beginning. The heat is increasing every day, and we will reach our peak Monday and Tuesday at 32C (89.6F). People walking early to avoid the rising temperatures in Dunsden (Oxfordshire), this morning.

People out walking early this morning in Dunsden, Oxfordshire. Parents have been told to keep their children indoors ahead of the longest heatwave in years, with temperatures set to soar to 33C from this weekend

People out walking early this morning in Dunsden, Oxfordshire. Children should be kept indoors due to the longest heatwave for years. It is expected that temperatures will soar up to 33C this weekend.

High pressure will be dominating most of the UK, so there will be plenty of sunshine throughout the weekend. There may also be some cloud in Northern Ireland, Scotland and Northern Ireland.

He stated that it appeared like the pressure will continue to be high into next week. It may begin to fall Tuesday and Wednesday. Temperatures will drop and then it will cool down later in the week.

“Very similar today’s 28C (82.4F), tomorrow’s sunshine will be abundant across the UK, with temperatures reaching around 30C (86F).”

The temperatures could soar to 32C (89.6F) Monday in the South and East of England. Tuesday will be 33C (91.4F), Wednesday 31C (87.8F).