All Regions When Clouds Cave When airplanes pass through clouds with supercooled water droplets, they can leave distinctive holes in their wake. Read More… About Author OTW Observer See author's posts Post navigation Previous Subtropical System Moves In….Next Surge of Dust in the Caribbean… Related Stories London warning of ‘extreme’ wildfire risk this weekend as 31C heatwave continues All Regions Europe London warning of ‘extreme’ wildfire risk this weekend as 31C heatwave continues July 10, 2026 Exact dates BBC Weather experts are forecasting 3 days of London thunderstorms after heatwave All Regions Europe Exact dates BBC Weather experts are forecasting 3 days of London thunderstorms after heatwave July 10, 2026 UK heatwave to last longer than expected as Met Office reveals when London will cool down slightly All Regions Europe UK heatwave to last longer than expected as Met Office reveals when London will cool down slightly July 9, 2026