What is the hottest day on record in the UK? When and where

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A heatwave is expected to bring scorching temperatures across the UK.

Rising temperatures and heat waves are expected across much of the UK.

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The Met Office expects temperatures to rise to 30C in some areas on Sunday (July 10).

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Highs of 29C and clear skies are expected in London and south-east England in the afternoon, making the country hotter than parts of the Maldives.

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The heatwave is set to continue into next week, with temperatures set to soar above 32C on Tuesday, potentially making it the warmest day of the year so far.

A heat health alert has also been issued for some regions, with affected areas advised to shade or cover windows and check on vulnerable and elderly people.

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The UK Health Security Agency (UKHSA) warning applies from July 11-15, including regions in the south-east and east of England.

Vigo in Spain fines holidaymakers who urinate in the sea (Photo: Getty Images)

But what is the hottest day on record in the UK?

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When was the hottest day on record?

The Met Office has declared Thursday 25 July 2019 to be the hottest day on record.

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A temperature of 38.7 °C was measured in Cambridge.

It surpassed the previous record of 38.5°C set in Faversham, Kent, in August 2003.

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dr Mark McCarthy of the Met Office’s National Climate Information Center said: “Historically, summer heatwaves in the UK have tended to peak in the low 30s, with extreme events reaching the mid 30s.

“Britain’s climate has been warming since the mid-20th century and this has been accompanied by a similar increase on the hottest day of the year, 0.8°C higher over the past decade than in the 1961-1990 period.

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“Climate change has increased the likelihood and severity of heat waves across Europe, which will also have increased risks of a 40.0°C temperature event in the UK.”

This won’t necessarily happen – it’s a possible predicted temperature recorded as part of a range of possibilities modeled by the Met forecasting system – but it’s surprising nonetheless.

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Where was it recorded?

The hottest day on record – Thursday 25 July 2019 – has been recorded at the Cambridge Botanical Garden.

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The recording was made at the University of Cambridge Botanic Gardens, which houses a Met Office climate observatory that reports every 24 hours.

What is the hottest temperature recorded on Earth?

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The hottest day on record according to Guinness World Records was recorded at Greenland Ranch in California’s Death Valley.

On July 10, 1913, a temperature of 56.7 °C (134 °F) was recorded at the site.

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What is a Heat Wave Health Alert?

The UK Health Security Agency (UKHSA) has issued a yellow heatwave warning which will be in effect from July 11th to July 15th.

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It will cover regions including some in the south east and east of England.

It is triggered when the Met Office confirms that threshold temperatures for one or more regions have been met for one day and the following night, and the next day’s forecast shows a greater than 90 per cent confidence level that the daily threshold temperature will be met.

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At this stage, social and health services need to take specific action for high-risk groups.

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