The RAF is suspected of spraying salt, dry ice or silver iodide from aeroplanes. In natural circumstances, water gathers around specks of dust or salt and forms ice crystals that attract other droplets, until they are heavy enough to fall. Rain making involves dropping material into clouds to encourage water vapour to coalesce into raindrops. In the past 50 years, cloud seeding has been carried out in attempts to relieve drought and to encourage snowfall in ski resorts. “We use the latest technology in radar systems to tell us how much moisture is in the air, so we can figure out how much gel to disperse over the cloud formation,” says JD Dutton, President of Dyn-0-Mat, Florida, a company which makes gel-like flakes that have been used to seed clouds. The Lynmouth flood might serve as a warning to those seeking to coax rain from the skies today, but they claim to be able to control the amount of rain they produce.
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