As Britain braces for another heatwave, dental experts are warning that rising temperatures could spell trouble for your oral health. According to Hampshire-based dentist Dr Robin Hanna, hot weather can increase the risk of tooth sensitivity, enamel damage and cavities. With the Met Office forecasting temperatures above 30°C in parts of the UK during July 2025, these concerns are timely.
Dr Hanna, practice owner at Hampshire Dentists, spoke with Marc Porcar, CEO of QRFY, to highlight how summer conditions affect teeth. Drawing on years of clinical experience, he outlined several risks that could lead to costly dental visits if ignored.
Dehydration is a key threat during hot weather. Many people fail to increase their fluid intake in the heat, which reduces saliva production. Saliva is essential for neutralising acids and washing away bacteria. A 2023 study by the British Dental Association noted that saliva flow drops by up to 30% in dehydrated individuals, leaving teeth more vulnerable to decay. Bacteria thrive in warmer conditions, making this even more of a concern.
The consumption of sugary and acidic beverages increases during summer. Drinks like sports drinks, soft drinks, iced coffee and fruit juices erode enamel and feed cavity-causing bacteria. The NHS reports that 46% of UK adults consume sugary drinks daily during summer, which raises the risk of gum disease. Using a straw can help, but moderation remains important.
Chewing ice is a common habit during hot weather, but it puts stress on teeth. Teeth, naturally at 37°C, can develop microcracks when exposed to ice as enamel expands and contracts with temperature changes. The British Dental Journal warns that chewing ice can chip or fracture enamel, especially if fillings or crowns are present, since these expand at different rates. A 2024 survey found 22% of UK adults chew ice regularly during heatwaves.
Mouth breathing during strenuous exercise or in hot air can dry out the mouth and reduce saliva. This, combined with sugary foods and drinks, creates a breeding ground for decay. The Oral Health Foundation estimates that one in three Britons experiences dry mouth during summer, which heightens the risk of gum issues.
Marc Porcar commented, “Getting outside and enjoying the sun is great for mental and physical health, but many people don’t realise the added risks that may come with that change of scenery, be it from sunburn or increased risk of tooth decay. However, there are productive things you can do to mitigate the risks.”
Dr Hanna added, “Summer should be full of smiles. Look after your teeth by drinking plenty of water, take care with ice and keep sugary food and drinks to a minimum wherever possible. If you do indulge, make sure to rinse your teeth with water straight afterwards. This helps to wash the sugar and acid away. Even though it is hot, try to keep to your good all-year-round healthy habit of flossing daily and brushing two times a day for two minutes. After you brush, spit, do not rinse with water. Let the toothpaste work its magic.”
The Oral Health Foundation advises booking a dental check-up before summer to catch issues early. With NHS fillings starting at £73.50, prevention is more cost-effective than treatment. By following these expert tips, Britons can enjoy the heatwave without compromising their smiles.
