Kent is on heightened heatwave warning today as Britain continues to bask in the longest period of hot weather for six years.

The Met Office issued the Level 3 heatwave alert for the region, with health experts now required to take action to protect the elderly and very young.

Temperatures in part of the county could reach 33C today after more than a fortnight of sizzling weather.

According to the Met Office, there is a 90% probability of heatwave conditions across the south east until Thursday evening.

Doctors from Public Health England in the south east today urged people to seek shade to cool down and keep hydrated with cool fluids.

Health and social care workers in the community, hospitals and care homes are advised to regularly check on vulnerable patients.

Regional director Dr Jenny Harries said: "While many people enjoy hot weather, high temperatures can be dangerous, especially for people who may be particularly vulnerable such as older people, young children and those with serious illnesses.

"The Heatwave Plan is an important component of overall emergency planning and sets out a series of clear actions that can be taken by healthcare organisations, local authorities, professionals working with vulnerable people, and individuals to help keep people safe during extreme heat.

"During very hot weather, pregnant women and people who have chronic illnesses, including cardiovascular, respiratory, renal conditions, diabetes or Parkinson’s disease, may experience discomfort if indoor temperatures are particularly hot and in using public transport."

She added: "Employers should ensure indoor areas are kept cool and consider allowing these individuals to travel to or from their place of work during cooler, or less busy, times of the day.

"For those working or exercising outdoors, strenuous physical exertion during the hottest part of the day should be kept to a minimum."

The Met Office alerts - the first of the summer - are designed to protect vulnerable people, such as young children, very old people and those who are unwell, from the effects of a heatwave.

Run in association with the Department of Health, the Heat-Health Watch system operates up until September 15.

The warnings go as high as Level 4, at which even healthy people are at risk - although the measure has never been issued.