Overview

• The Met Office forecasts highs of 29C on Friday, marking the hottest day of 2025 so far and raising the possibility of heatwave conditions in parts of the northwest Midlands, northwest England and northeast Wales.
• Deputy Chief Meteorologist Mike Silverstone warns that elevated humidity and warm overnight lows will heighten discomfort and may disrupt sleep patterns.
• Guidance from OVO Energy and the Red Cross recommends keeping curtains and south-facing windows closed during daylight hours to block solar heat gain.
• Heating professionals from BOXT advise homeowners to open windows strategically for cross breezes and to allow cooler night air inside.
• NHS guidelines caution that indoor temperatures above 20C can endanger babies and the elderly, especially in UK homes designed to retain winter heat.