The Met Office has upgraded its heatwave warning in Sussex, as temperatures are set to reach 28C tomorrow.

A Level 3 heatwave alert was issued this morning, requiring healthcare services to help high-risk groups.

The warning is triggered when the Met Office confirms there is a 90 percent chance of heatwave conditions, when temperatures are high enough over threshold levels to have a significant effect on health on at least two consecutive days.

Following this latest Met Office alert, Public Health England is continuing to remind people to be aware of the health risks of hot weather.

Dr Angie Bone, Heatwave Plan lead for PHE, said: “In this continued hot weather, it’s important to remember that high temperatures can be dangerous, especially for people who may be vulnerable such as older people, young children and those with serious illnesses.

“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.

"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 key message for healthy individuals is to follow public health messages on how to enjoy the sun safely by staying cool, drinking lots of cold fluids and checking on those you know are at risk.”

Key public health messages for staying safe:

• Try to keep out of the sun between 11am and 3pm.

• If you have to go out in the heat, walk in the shade, apply sunscreen and wear a hat.

• Avoid physical exertion.

• Wear light, loose fitting cotton clothes.

• Drink plenty of cold drinks.

• If you have a health problem, keep medicines below 25 °C or in the refrigerator.

• Look out for others especially vulnerable groups such as the elderly, young children and babies and those with serious illnesses.

• Never leave anyone in a closed, parked vehicle, especially infants, young children or animals.

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