As the UK experiences another heatwave, homeowners are encouraged to explore natural cooling methods instead of relying on electric fans. Experts, including those from the British Red Cross, suggest using houseplants as an effective way to lower indoor temperatures. Leafy plants placed on windowsills can absorb sunlight and release moisture, creating a cooler atmosphere. The British Red Cross highlights that these plants act as natural filters for sunlight and are suitable for renters due to their semi-permanent nature. NASA's Earth Science Study notes that plants provide ground-level shade and contribute to precipitation, which helps cool the Earth. Recommended houseplants for this purpose include the heat-resistant Sansevieria and Aloe Vera. In addition to plants, the British Red Cross advises using thermally lined curtains and blackout blinds to block sunlight and insulate against heat. Proper ventilation is also crucial; windows should be closed during the hottest parts of the day and opened at cooler times to facilitate air circulation. Homeowners are urged to seek medical advice if heat affects their health.