it only takes one spark to start a wildfire that can spread for miles and rage for days but with climate changing and land becoming drier, it s providing the perfect conditions for wildfires to blaze and even in traditionally cooler parts of the world, wildfires are becoming more unpredictable. clouds are dominating the skyline today but back in the summer, it was very different. it had been particularly dry and this piece of moorland in west calderjust outside of edinburgh burned for three days. it took 60 firefighters and 12 appliances to eventually bring it under control. doctor tom smith is a wildfire expert. i believe you re at the site of a summer grassland fire in scotland which is very unusual. fires normally occur in the spring, when the heather fuels have dried out and become available to burn before they green up