The UK is experiencing an unprecedented heatwave, with temperatures expected to reach 40°C in parts of central and southern England and Wales on June 24, 2026—a new record high for June. The Met Office has issued a red weather warning, indicating a risk to life even for healthy individuals. This is only the second time such a severe warning has been issued in the country.
The current heatwave, described as a “heatdome,” is caused by a mass of hot air originating from the Sahara desert that remains stationary over the region, trapping warmth beneath it for several days. Experts note that these conditions can have significant effects on both physical health and cognitive function. Dr. Laurence Wainwright, senior lecturer at the University of Oxford, explains that the body expends substantial energy trying to stay cool, which can impair concentration, working memory, and problem-solving abilities. This may also increase irritability and impulsivity.
Cognitive rehabilitation specialist Natalie Mackenzie warns that disrupted sleep patterns during extreme heat further reduce emotional resilience. “By day three of a heatdome, many people experience difficulties in personal relationships and work,” she says. Stress management and maintaining patience become particularly challenging under these circumstances.
Health professionals advise avoiding major decisions or demanding mental tasks during the peak heat, especially in the mid to late afternoon. Staying indoors when possible and remaining hydrated can help mitigate the effects of heat stress. Although official hydration guidelines are lacking, a useful indicator is pale yellow urine, signaling adequate fluid intake. Delaying difficult conversations and important work tasks until cooler days is also recommended.
Dietary adjustments may ease discomfort and improve sleep quality during the heatwave. Sleep expert Dr. Neil Stanley suggests lighter meals such as salads and seafood over fatty or sugary foods, which increase body temperature. Likewise, sleep researcher Dr. Sophie Bostock advises against eating late at night, as it can delay the circadian rhythm and interfere with falling asleep.
In terms of weight management, brief heatwaves can cause temporary water retention, leading to slight weight gain that should not be a cause for concern.
Pet owners face additional challenges in protecting animals during extreme temperatures. Veterinarian Dr. Angela Jones emphasizes the importance of adjusting dogs’ exercise routines, recommending walks during cooler early morning or evening hours and shortening their duration. Owners are urged to test pavement temperature by holding the back of their hand to the surface for five seconds—if it is too hot for the skin, it is unsafe for dogs’ paws. Providing fresh water, ice treats, and shaded areas or paddling pools can help keep pets cool. She also stresses the dangers of leaving animals unattended in vehicles, where temperatures can rise rapidly to life-threatening levels. Signs of heatstroke in pets include excessive panting, drooling, and vomiting, and urgent veterinary care is advised if these occur.
Cats are similarly vulnerable to dehydration and heat stress; multiple water sources and shaded areas should be available, and outdoor cats should be monitored carefully during the hottest periods.
Practical measures are suggested to help people keep their homes and cars cooler. Dr. Stanley recommends placing a bag of frozen peas in front of a fan to lower air temperature and creating ventilation by opening windows and loft hatches to draw warm air out. Car experts advise parking next to large vehicles like lorries for shade, opening windows briefly before activating the air conditioning to expel hot air, and keeping windows open for the first minute of driving to improve cooling efficiency. Disabling eco-modes in vehicles can also enhance air conditioning performance.
Exercise routines should be adjusted to avoid the hottest parts of the day, with sports medicine consultant Dr. George Bownes advising lower-intensity activities such as yoga or Pilates, ideally performed indoors or in shaded areas. Early morning or evening exercise sessions are preferable to reduce heat exposure.
This heatwave poses multiple challenges across daily life, requiring careful management of health, safety, and routine activities until conditions improve.