As temperatures are set to reach at least 29°C across parts of the UK this bank holiday weekend, health officials are advising the public to observe a crucial '11am to 3pm' rule. The UK Health Security Agency warns that failing to avoid direct sunlight during these peak hours could increase the risk of dehydration, heat exhaustion, and sunburn.
The Met Office forecasts some of the hottest weather of the year so far, prompting millions to head outdoors. However, guidance published on GOV.UK states: 'Stay out of the sun, especially between 11am and 3pm when UV rays are strongest.' Health officials also recommend minimising physical activity during this period.
The NHS cautions that heat exhaustion can escalate to heatstroke, a medical emergency that may cause confusion, seizures, or loss of consciousness. To keep homes cool, the government suggests drawing curtains in sun-facing rooms and keeping windows closed during the hottest part of the day, then opening them in the evening to improve ventilation.
Experts from the Energy Saving Trust note that closing blinds and curtains can significantly reduce indoor temperatures. Staying hydrated is also essential; the British Nutrition Foundation advises adults to drink fluids regularly even if not thirsty, as dehydration can develop quickly in high temperatures.
Vulnerable groups, including the elderly, infants, and those with underlying health conditions, are most at risk. The UK Health Security Agency urges people to check on family members, neighbours, and vulnerable individuals. Pet owners are reminded not to leave animals in parked cars, as temperatures inside can rise rapidly even with windows open.
Forecasters suggest the warm weather may continue into next week if high pressure persists. While many will enjoy the sunshine, experts stress the importance of doing so safely.
