The Met Office is setting the bar high for a heatwave – but only in certain parts of Britain.

The Met Office is raising the temperature threshold for heat waves in eight English counties because of global warming.

Heat waves are defined as when daily limits are reached or exceeded in an area for at least three consecutive days.

The Committee for the Weather and Climate Change announced that the three-day temperature threshold for a heatwave would rise to 28C across six county areas: Surrey, Berkshire, Buckinghamshire, Bedfordshire, Hertfordshire and Cambridgeshire.

The UK is forecast to rise from 26C (79F) in Lincolnshire to 27C (51F) in the South West and from 25C (77F) to 26C (74F) in the East Riding of Yorkshire.

The definition of a heatwave is related by the actual climate.

Dr Mark McCarthy, director of the Met Office National Climate Information Centre which administers the UK ‘Climate statistics over time reveal an undeniable warming trend for the UK.

Earlier heatwave thresholds were based on climate over the 1981-2010 period and should be reviewed and re-examined to show heatwaves relative to today’s climate, the Met Office said.

Met Office

The Meteorological Office, abbreviated as the Met Office, is the United Kingdom’s national weather service. It is an executive agency and trading fund of the Department for Business, (wikipedia)

Public Health England

Public Health England was an executive agency of the Department of Health and Social Care in England which began operating on 1 April 2013 to protect and improve health and wellbeing and reduce heal (wikipedia)

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