The United Kingdom is preparing for another heatwave, with the UK Health Security Agency (UKHSA) issuing a yellow heat health alert for southern and eastern England and the East Midlands from Saturday until Wednesday. This follows a period of exceptionally high temperatures that marked the country's hottest May and June days on record.
Temperatures are forecast to approach the high 20s Celsius across parts of England, potentially reaching 30C in the Southeast, with mid to high 20s expected in Wales, according to the Met Office. This anticipated heatwave comes after a recent cool-down, but experts caution against complacency, urging preparedness for the renewed period of warmth.
Preparing Homes for High Temperatures
Experts are offering guidance on how to make indoor spaces more comfortable during the heat. Simple adjustments to furniture placement can improve air circulation, with advice to move large, solid items like wardrobes away from direct pathways between windows. Maintaining clear pathways around furniture, walls, and floors is recommended to allow cool breezes to move freely.
Sealing gaps around windows and doors is another suggested measure, as these openings can allow heat to enter during the summer, similar to how they allow heat to escape in winter. This is described as a quick and cost-effective way to maintain a cooler indoor environment.
Window Treatments and Textiles
Addressing how heat enters the home through windows is considered a primary concern. Installing external awnings or shutters can help block direct sunlight before it reaches the glass. Internally, blackout blinds or curtains are recommended and should be kept closed during the day to prevent sunlight from heating rooms.
Heavy textiles like thick carpets and rugs can act as insulators, trapping heat. Experts suggest rolling up thick pile rugs and opting for lighter, flatweave styles. Exposing stone or ceramic floors, which stay cool to the touch, can also help dissipate heat.
Furthermore, many indoor textiles, such as cushions and throws made from synthetic fabrics like polyester, can retain heat and humidity, making rooms feel warmer. Swapping these for items made from natural, breathable fabrics is advised.
Nighttime Ventilation and Cooling Strategies
While it may be tempting to open windows during the day, experts recommend doing so only after the sun has set and temperatures begin to drop. Opening windows during the hottest part of the day can draw more hot air into the house. To create a cooling cross breeze, it's suggested to open bedroom windows and leave the bedroom door open. Ensuring the highest window in the house, such as in an attic or loft, is open throughout the evening can help heat rise and escape.
For those with air conditioning, advice focuses on efficient usage. Instead of setting units to the coldest possible temperature and running them overnight, it's recommended to cool rooms to between 22 and 24 degrees Celsius for 60 to 90 minutes before bed. Using sleep mode or a timer can help conserve energy and prevent excessive cooling.
Other Cooling Tips
Using a cold water bottle, filled with cold water and chilled in the refrigerator or freezer, can be placed between sheets before bed or used as a personal cooling aid during sleep. A warm shower before bed is also suggested, as it can help the body regulate its temperature more effectively than a cold shower, which might stimulate heat generation.
For those considering mattress purchases, natural fiber options like wool are recommended over memory foam, which tends to retain body heat due to its dense, energy-absorbent nature. Memory foam mattresses, invented in the 1960s by NASA, are designed to absorb shock, which also contributes to their heat-retaining properties.
Finally, with fans and air conditioning units often selling out quickly during warm weather forecasts, experts advise purchasing these appliances in advance. When choosing fans, considerations include reputable brands, quiet operation for bedroom use, and energy efficiency, particularly if the fan is intended for overnight use.