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A heat health warning has been issued as the country continues to bake in a mini-heatwave with temperatures set to climb even HIGHER and fears people could die.

The UK will be hotter than the Bahamas on 'Meltdown Monday', according to the Met Office, as a week-long Spanish roast nudges record 35C highs.

And as more hot air pushes north from France and Spain, an amber level 3 Government heat health warning - one tier below a level 4 national emergency - has been issued.

Lasting until Wednesday, the notice orders community groups to "activate community emergency plans", and warns hospitals to be on guard.

Health staff are also compelled to make daily contact with the ill, vulnerable and elderly.

A 10-day scorcher in 2003 resulted in 2,000 heat-related deaths and another hot spell in 2006 killed 680.

Public Health England’s Heatwave Plan for England said: "Excessive exposure to high temperatures can kill. Excess seasonal deaths start to occur at 25C."

(Image: Barcroft Media)

(Image: SWNS)

(Image: Rex Features)

The Met Office June-August forecast said: "There is a clear shift towards warmer-than-average conditions for June-August.

"Sea surface temperatures close to the UK are above normal, increasing the chances of higher-than-average-temperatures through the period.

"There is a normal chance of drier-than-average conditions, with the chances of above and below-average rainfall fairly balanced."

(Image: Andrew Hasson)

In Oldham, Manchester, one Twitter user posted a temperature gauge showing an incredible 46C.

The Met Office told MirrorOnline this is typical of a very hot day in the UK as the recording would have been made in direct sunlight.

Official temperatures are recorded in the shade.

The Weather Outlook forecaster Brian Gaze said: "37C is possible in the UK this summer as long as the early summer pattern of heat being pumped up from southern Europe continues.

"This summer has a higher than average chance of extreme heat in the UK. It’s promising news for Wimbledon and school holidays.

"Hot air arriving from around Spain always leads to very warm spells in UK, but this year this hot air could be even hotter when it arrives in Britain after incredible 42C early summer heat in Iberia."

(Image: Rex Features) (Image: Rex Features)

Meanwhile, music fans could enjoy the hottest ever Glastonbury Festival, with temperatures potentially reaching 10C higher than usual, forecasters say.

The weather is expected to stay dry in the lead-up to the weekend, with a 20% chance of "isolated showers" on Wednesday and Thursday.

(Image: Rex Features)

A blast of hot air from France could blow over to the Somerset site on Thursday, resulting in sizzling temperatures of more than 30C.

Glastonbury's infamous mud could make an appearance at the weekend though, when the weather is expected to be "changeable".

The 900-acre festival site, being headlined by Radiohead, the Foo Fighters and Ed Sheeran, will host a population of 200,000 during the event.

(Image: SWNS.com) (Image: SWNS.com)

"It is mainly going to be dry, looking at the whole event," a spokeswoman for the Met Office said. "Wednesday, Thursday and Friday look dry with good spells of sunshine.

"The temperatures are expected to be in the mid to high 20s for all three of those days.

"Normally for that time of year, you would expect temperatures of 19 or 20C for Glastonbury, so it is going to be rather warm.

"People should take care in the heat, drink lots of water and take sun cream with them."

(Image: Barcroft Media) (Image: Rex Features) (Image: SWNS.com)

The Met Office spokeswoman said temperatures were expected to fall by the weekend, feeling "cooler and fresher" on Saturday and Sunday.

"We would describe the weather as changeable," she added. "We could see a mix of sunny spells and showers.

"There is around a 20% chance that we could see something a little bit hotter on Thursday.

"This could mean heating up towards 30C or the low 30s. That has the potential to trigger some rain.

"There is a wedge of really hot air that is going to blow over France. That air could waft over the south of England."

If that happens, temperatures in eastern and southern England could see temperatures of 33 or 34C.