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| Heatwave: Health warnings issued for south-east England | Heatwave: Health warnings issued for south-east England |
| (about 17 hours later) | |
| Health warnings have been issued as heatwave conditions are reached in London and the South East. | Health warnings have been issued as heatwave conditions are reached in London and the South East. |
| 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. | 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. |
| The warning alerts healthcare services to help those in high-risk groups such as the elderly and young children. | 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. | 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: |
| Level 3 is one notch below the most serious warning in the Met Office's heat-health watch system. | Level 3 is one notch below the most serious warning in the Met Office's heat-health watch system. |
| The temperatures that trigger local action plans vary according to location and may involve health, housing, and social care services, to protect those susceptible to the heat. | The temperatures that trigger local action plans vary according to location and may involve health, housing, and social care services, to protect those susceptible to the heat. |
| 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. |
| 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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