As temperatures are set to soar across the UK this Bank Holiday weekend, sleep experts are advising Britons against using electric fans overnight, despite the temptation for relief. The Met Office has forecast highs of 35°C in parts of England on Monday and Tuesday, potentially breaking the May record of 32.8°C.
Dr Kiran Dintyala, speaking to Sleep Advisor, warned that fans circulate dust and pollen, which can trigger severe reactions for allergy and asthma sufferers. The continuous airflow also dries out the room, leading to dehydration, dry eyes, sinus infections, bronchitis, and nosebleeds. Sleeping with an open mouth can result in a sore throat, and prolonged exposure to cool air may cause stiff, aching muscles.
Martin Seeley, CEO of Mattress Next Day and a sleep expert, echoed these concerns, advising that fans should be turned off regardless of humidity. He noted that dust-laden fan blades can cause itchy eyes, runny nose, sneezing, and breathing difficulties. The constant breeze can also dry nasal passages, prompting excess mucus production and leading to congestion, head pressure, and sinus headaches.
Seeley emphasised the importance of staying hydrated, as even mild dehydration can worsen daytime fatigue. He also cautioned against directing fans at areas with pre-existing muscle pain, such as from exercise or poor desk posture.
The advice comes as the Met Office predicts temperatures will remain at 28°C or above until at least Thursday. An official heatwave is declared when temperatures hit the threshold—ranging from 25°C to 28°C depending on the county—for three consecutive days. The forecast for late May into early June suggests continued warm and dry weather, with possible showers in the west.
