Buncefield fire - A picture of the Buncefield incident where a petrol tank exploded as a result of a vapor cloud formed because of an overflowed tank. The fire raged on for about 4 days and there were reports where the firemen who worked to extinguished the flames had to do it twice for a few tanks because it reignited. This was due to the property of petrol which was kept in the tanks and sheer amount of it.