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Heatwave: Met Office upgrades warning for south-east England Heatwave: Met Office upgrades warning for south-east England
(35 minutes later)
The Met Office has upgraded its heatwave health warning in parts of the UK, as temperatures continue to rise. Health warnings have been issued as heatwave conditions are reached in London and the South East.
It said they could reach "Level 3 heat-health watch criteria" in London and the South East with temperatures topping 30C (86F), requiring healthcare services to help high-risk groups. The Met Office issued a "Level 3" warning on the hottest day of the year, with temperatures hitting 32C (89.6F) at Northolt, west London.
Two Level 3 warnings were issued last week in Yorkshire and the Humber, and in south-west England. The warning alerts healthcare services to help those in high-risk groups such as the elderly and young children.
Two similar heatwave warnings were issued last week in Yorkshire and the Humber, and in south-west England.
It is the UK's first prolonged heatwave since 2006.It is the UK's first prolonged heatwave since 2006.
While the warm weather has been welcomed by sunbathers, sport watchers and barbecue fans, health officials said the heat could be dangerous for very young children, elderly people, pregnant women and those with serious illnesses.While the warm weather has been welcomed by sunbathers, sport watchers and barbecue fans, health officials said the heat could be dangerous for very young children, elderly people, pregnant women and those with serious illnesses.
The heat has also caused problems for drivers and rail passengers in parts of England this week, after road surfaces melted and tracks buckled in the heat.The heat has also caused problems for drivers and rail passengers in parts of England this week, after road surfaces melted and tracks buckled in the heat.
In other developments:In other developments:
Wednesday set the record for the hottest day of the year, with temperatures of 31.9C recorded by the Met Office at Heathrow Airport.
The Met Office's "Level 3" warning - only one notch below the most serious alert - is part of the heat-health watch system, which is intended to put health, housing, social care and other public bodies on alert in case of a heatwave.The Met Office's "Level 3" warning - only one notch below the most serious alert - is part of the heat-health watch system, which is intended to put health, housing, social care and other public bodies on alert in case of a heatwave.
The trigger temperatures that see local plans put into action to protect those susceptible to the heat vary according to location.The trigger temperatures that see local plans put into action to protect those susceptible to the heat vary according to location.
In north-east England it is 28C, in Wales 30C and in London 32C. The night-time trigger temperatures vary from 15C to 18C.In north-east England it is 28C, in Wales 30C and in London 32C. The night-time trigger temperatures vary from 15C to 18C.
Alerts are triggered when threshold temperatures have been reached for one day and the following night, and the forecast for the next day has a greater than 90% confidence level that the day threshold temperature will be met.Alerts are triggered when threshold temperatures have been reached for one day and the following night, and the forecast for the next day has a greater than 90% confidence level that the day threshold temperature will be met.
Scotland and Northern Ireland are not included in the alert system.Scotland and Northern Ireland are not included in the alert system.
BBC weather forecaster Chris Fawkes said a heatwave, according to the World Meteorological Organization, occurred when temperatures were five or more degrees above average for at least five days.BBC weather forecaster Chris Fawkes said a heatwave, according to the World Meteorological Organization, occurred when temperatures were five or more degrees above average for at least five days.
He said the UK was already in a heatwave and the alert was essentially a health warning, telling healthcare professionals to watch out for vulnerable people.He said the UK was already in a heatwave and the alert was essentially a health warning, telling healthcare professionals to watch out for vulnerable people.
Forecasters expect it to hit 32C in the London area on Wednesday, with a few isolated showers possible later.
While most places will be largely dry and very warm on Wednesday, northern and western parts of the UK will be cloudy.While most places will be largely dry and very warm on Wednesday, northern and western parts of the UK will be cloudy.
Health officials in England are advising people experiencing the very hot weather to stay cool, drink lots of cold fluids and keep an eye on those they know to be at risk.Health officials in England are advising people experiencing the very hot weather to stay cool, drink lots of cold fluids and keep an eye on those they know to be at risk.
Dr Angie Bone, who is leading Public Health England's heatwave plan, said its efforts involved health and social care workers in the community; hospitals and care homes regularly checking on vulnerable patients; sharing sun safety messages; and making sure room temperatures were set below 26C.Dr Angie Bone, who is leading Public Health England's heatwave plan, said its efforts involved health and social care workers in the community; hospitals and care homes regularly checking on vulnerable patients; sharing sun safety messages; and making sure room temperatures were set below 26C.
Under the plan, officials ensured patients had access to cold water and ice, and that medicines were stored in a cool place, she added.Under the plan, officials ensured patients had access to cold water and ice, and that medicines were stored in a cool place, she added.
The NHS says the main risks posed by a heatwave are dehydration, overheating, heat exhaustion and heatstroke.The NHS says the main risks posed by a heatwave are dehydration, overheating, heat exhaustion and heatstroke.
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