With the UK heatwave set to shatter May temperature records this Bank Holiday weekend, many Brits are turning to portable fans to find relief from the soaring mercury. However, sleep experts are warning against leaving fans running overnight, despite the tempting relief they offer in the sweltering heat.
The Met Office forecasts that up to 18 counties could see temperatures of 34°C or higher on Monday and Tuesday, possibly reaching 35°C in London and the southwest. These figures could mark the warmest May days ever recorded in the UK, surpassing the current record of 32.8°C.
In an effort to combat restless, sticky nights, many have dusted off their oscillating fans. Yet, Dr Kiran Dintyala, speaking to Sleep Advisor, advises caution. He explains that fans continually circulate dust and pollen, exacerbating allergies and asthma symptoms. The constant airflow also dries out rooms, which can lead to dehydration, dry eyes, sinus infections, bronchitis, and nosebleeds. Sleepers breathing through their mouths risk waking up with sore throats, and prolonged exposure to cool air overnight may cause stiff, aching muscles.
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Mattress Next Day CEO and sleep specialist Martin Seeley echoes Dr Dintyala’s concerns, emphasizing that fans should be turned off while sleeping. He adds that dusty fan blades can trigger itchy eyes, runny noses, sneezing, and breathing problems. The drying effect of the fan’s airflow also causes nasal passages to dry out, prompting overproduction of mucus, which can lead to congestion, sinus pressure, and headaches. Drinking plenty of water in the morning can help alleviate these symptoms.
Seeley also warns that individuals with pre-existing muscle pain should avoid directing fans onto those areas during sleep to prevent worsening discomfort.
The advice comes as the Met Office predicts a continuation of warm temperatures, with highs of 28°C or above expected through to Thursday. A heatwave is officially declared when temperatures exceed 25°C to 28°C, depending on the region, for three consecutive days. Warm and dry conditions are likely to persist into early June, though some coastal areas may experience cooler breezes and occasional showers.
As the UK endures this exceptional heat, experts stress the importance of staying hydrated and managing sleep environments wisely to maintain health and wellbeing during the record-breaking warmth.