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Hot temperatures in the UK expected to last until the weekend Hot temperatures in the UK expected to last until the weekend
(about 4 hours later)
The Met Office has issued a yellow health warning for heatwave conditions from Tuesday until Thursday evening. A health warning for heatwave conditions is in place for parts of the UK until Thursday evening.
The warning means there is an 80% chance of temperatures which could be a risk to health, and is intended to help social and healthcare teams prepare. The yellow warning means there is an 80% chance of temperatures being a risk to health.
Fears that railway tracks could buckle in the heat prompted Network Rail to introduce speed restrictions. Tuesday is officially the hottest day of the year so far - with 30.2C, recorded in north-east Wales, beating Monday's peak.
The hot weather is expected to last until the weekend, when temperatures are forecast to slowly drop off.The hot weather is expected to last until the weekend, when temperatures are forecast to slowly drop off.
The Met Office said heatwaves can be dangerous for the very young, the elderly or those with chronic disease. The Met Office issued the yellow health warning for the west and north-east of England, in place from 09:00 BST on Tuesday until 18:00 BST on Thursday.
The yellow health warning, covering the west and north-east of England, refers to conditions between 09:00 on Tuesday and 18:00 BST on Thursday. It is intended to help social and healthcare teams prepare for the potential dangers a heatwave can present, especially to the very young, the elderly or those with chronic disease.
Hay-fever sufferers will also be impacted as the Met Office forecasted very high levels of pollen across England, Wales and Northern Ireland throughout the week. There's also bad news for hay-fever sufferers as very high levels of pollen are forecast across England, Wales and Northern Ireland throughout the week.
BBC Weather presenter Ben Rich said that the west of Britain, especially the Midlands and south-east Wales, were likely to experience the highest temperatures of up to 30C on Tuesday.
"Tomorrow, it could start out a bit cloudy and murky for some of the east coast of Scotland and eastern England," he said. "Then it is another plain sailing day, with long spells of hot sunshine, and by this stage even Northern Ireland and Scotland will be close to 30C."
The heat will continue until the weekend, with cooler weather in eastern areas and the chance of a shower on Sunday, he said.
Some schools have said they are cancelling sports days because of the "extreme heat".Some schools have said they are cancelling sports days because of the "extreme heat".
On Monday the highest temperature of 30.1C (86.2F) was recorded at Hampton waterworks in west London. Hottest day... so far
The year's previous record temperature had been 29.1C in April at St James's Park in central London. The highest temperature of 30.2C (86F) was recorded at Hawarden Airport in north-east Wales on Tuesday, just edging the 30.1C registered in west London on Monday.
In Scotland, the highest temperature of 26.7C was recorded in Balmoral, while the same temperature was also reached in Castlederg, Northern Ireland. In England, the hottest spot was Chivenor in Devon, with a temperature of 30C, while Aviemore in Scotland and Castlederg in Northern Ireland both reached temperatures of 26.4C.
Temperatures reached 28.7C in Usk, in south-east Wales. The Met Office said that temperatures in the UK were expected to peak at 33C on Thursday.
BBC Weather presenter Ben Rich said Wednesday could start out "cloudy and murky" on the east coast of Scotland and eastern England but that the skies would clear over the course of the morning.
He said: "Then it is another plain sailing day, with long spells of hot sunshine, and by this stage even Northern Ireland and Scotland will be close to 30C."
The heat will continue until the weekend, with cooler weather in eastern areas and the chance of a shower on Sunday, he said.
The heatwave has been attributed to the jet stream looping to the north of the UK, and then back down to eastern Europe, creating an area of high pressure over the country which is not shifting.The heatwave has been attributed to the jet stream looping to the north of the UK, and then back down to eastern Europe, creating an area of high pressure over the country which is not shifting.
However, for Greece, the direction of the jet stream has produced very stormy conditions.However, for Greece, the direction of the jet stream has produced very stormy conditions.
The Met Office said that temperatures in the UK were expected to peak at 33C on Thursday. Merseyside is likely to enjoy the hottest weather on Tuesday, with highs of 31C forecast.
Network Rail said track temperatures could reach as much as 20C above the air temperature, meaning the steel rails can expand markedly. The reduced speeds are intended to lower the force exerted on the track, reducing the risk of buckling.
One route affected by the speed limits is the line between London Waterloo and New Malden, in south-west London, where trains will be slowed after 11:00 each day until Friday.
Network Rail said it had "specialist extreme weather teams" monitoring track-side temperatures at locations at risk of buckling steel.
Meanwhile, police have urged people to be careful of the temptation to swim in open water in the hot weather.
The warning came after the body of a man was recovered from a lake in Nutfield, Surrey, on Monday.
A search for a missing child at Westport Lake in Stoke-on-Trent resumed on Tuesday morning, after emergency services were called on Monday to reports that three children were in distress in the water.
Two of the children are safe and well, Staffordshire Police said.
The heat also started a wildfire across two square kilometres of moorland in Greater Manchester.
And in York, police officers smashed the windows of two cars to rescue dogs "struggling to breathe" inside. Police said they had referred the car owners to the RSPCA for prosecution.
The Trade Unions Congress (TUC) has urged bosses to ensure staff working outdoors are protected from the hot weather.
TUC general secretary Frances O'Grady said: "We all love to see the sunshine, but working outdoors in sweltering conditions can be unbearable and dangerous.
"Bosses must ensure their staff are protected with regular breaks, lots of fluids, plenty of sunscreen and the right protective clothing."
Heatwave health warnings explainedHeatwave health warnings explained
Green - minimum state of vigilance during the summer.Green - minimum state of vigilance during the summer.
Yellow - Alert and readiness - Social and healthcare services are on standby to reduce harm.Yellow - Alert and readiness - Social and healthcare services are on standby to reduce harm.
Amber - Heatwave action - Care services target high-risk groups, like the elderly, with specific help. General advice is given to keep homes cool, drink plenty of fluids, and so on.Amber - Heatwave action - Care services target high-risk groups, like the elderly, with specific help. General advice is given to keep homes cool, drink plenty of fluids, and so on.
Red - National emergency - Reached when a heatwave is so severe that illness and death may occur among the fit and healthy, not just among high-risk groups.Red - National emergency - Reached when a heatwave is so severe that illness and death may occur among the fit and healthy, not just among high-risk groups.
Threshold temperatures for triggering these warnings range from 28C in north-east England to 32C in London.Threshold temperatures for triggering these warnings range from 28C in north-east England to 32C in London.
Fears that railway tracks could buckle in the heat prompted Network Rail to introduce speed restrictions.
The railway infrastructure operator said track temperatures could reach as much as 20C above the air temperature, meaning the steel rails can expand markedly. The reduced speeds are intended to lower the force exerted on the track, reducing the risk of buckling.
Meanwhile, police have urged people to be careful of the temptation to swim in open water in the hot weather.
The warning came after the body of a man was recovered from a lake in Nutfield, Surrey, on Monday.
A search is continuing for a missing 13-year-old, named as Ryan Evans, at Westport Lake in Stoke-on-Trent.
The heat also started a wildfire across two square kilometres of moorland in Greater Manchester.
And in York, police officers smashed the windows of two cars to rescue dogs "struggling to breathe" inside. Police said they had referred the car owners to the RSPCA for prosecution.
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