Heatwave warnings extended to north-west England

Jessica Harris, from Cancer Research, said people should take extra precautions when spending time in the sun

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The heatwave warning for north-west England has been raised to "level three" by the Met Office.

Western England and Wales were the hottest part parts of the country on Friday, with the east marginally cooler.

Level three warnings are in place for the South West and the West Midlands, but warnings for south-east England and London have been reduced to level two.

It was the hottest day of the year in Scotland, Wales and Northern Ireland.

Temperatures reached 29C (84.2F) at Prestwick, South Ayrshire, 31C (87.8F) at Porthmadog, north Wales, and 30C (86F) at Castlederg, Co Tyrone.

Heatwave warnings alert healthcare services to help those in high-risk groups such as the elderly and young children.

Meanwhile, HM Coastguard has issued safety advice to swimmers and sailors after call-outs in the past month were up by nearly a quarter compared with the same period last year - as more people take to the coast to enjoy the sunshine.

From 15 June to 18 July this year, it dealt with 2,859 incidents, up 668 - or 23% - on the same dates in 2012.

Chief coastguard Peter Dymond said: "If you are heading out for a swim, check the sea conditions and remember that even though the sea may look calm on the surface, there is the danger of strong currents underneath."

And he urged those taking to boats, canoes and kayaks to wear lifejackets or buoyancy aids.

Scarborough beach People across the country have taken to the coast to enjoy the sunshine
Urban beach in Nottingham Others have sunbathed on urban beaches like this one in Nottingham's Old Market Square
Grass fire on southern edge of Epping Forest, east London London firefighters have tackled five times more grass fires this month than in the same period last year. On Friday, crews were called to Leytonstone
Soldiers from the Princess of Wales's Royal Regiment march through Folkestone, Kent Soldiers from the Princess of Wales's Royal Regiment marched in the heat of Folkestone, Kent
PM David Cameron at Lord's Prime Minister David Cameron was among those at Lord's for the second day of the second Ashes Test
Spectator at British Open Golf Championship at Muirfield, Scotland It was a more lethargic scene at the Open golf championship at Muirfield

The NHS in England said it was closely monitoring the performance of A&E departments as the hot weather continued, with casualty departments "very busy".

A spokesman said A&E had seen near record numbers of patients but it was not possible to tell at this stage how much of this was directly related to the hot weather.

In other developments:

Level three 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 again be met.

Heat health watch levels

Heat health watch levels

See Met Office warning map

The threshold temperature for north-west England is 30C.

Eastern areas will see cooler conditions on Friday, with London and south-east England reduced to a level two warning, and the East of England reduced to a level one warning - the minimum state of vigilance.

Level two warnings are also currently in place for the East Midlands and Yorkshire and the Humber. These alerts are triggered by a 60% or higher chance of the threshold temperature again being reached on the second day.

North-east England remains on a level one warning.

Too hot to sweat

Normally, when it is hot, the body copes by sweating.

As sweat evaporates, the body cools down.

But if humidity is high, that process is impaired

That's when you feel hot, sticky, and uncomfortable.

The NHS advises people to keep cool by wearing loose clothes, staying indoors in the coolest rooms and splashing faces and necks with cold water.

People with underlying health issues, particularly heart and breathing problems, are likely to suffer more.

Scotland, Wales and Northern Ireland are not included in the alert system.

The Met Office said it would become less hot for a time over the weekend, but temperatures are expected to increase again early next week with a likelihood of level three being reached again in some areas.

It is the UK's first prolonged heatwave since 2006, with six consecutive days of temperatures above 30C.

Research by the London School of Hygiene and Tropical Medicine has estimated there might have been between 540 and 760 extra deaths in England and 60 to 100 in Wales due to the hot weather.

Wednesday was the hottest day of the year, with 32.2C (89.9F) recorded at Hampton in south-west London.

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