Μake us preferred on GoogleSome of the largest wildfires to sweep through Europe since World War II had an unusual spark: an exceptionally wet winter. It exploded in recent days as devastating wildfires ripped through regions of France and Spain, forcing more than 300,000 people to evacuate. The clouds, which have been observed during wildfires in Canada and Australia, are created by intense heat that lifts hot smoky air and causes the water vapor to condense into ash. Another factor behind Europe’s intensifying fires is the growing amount of wild vegetation in Europe. The wildfires threatening Madrid carried about as much energy as 29 of the bombs dropped on Hiroshima, said Resco de Dios.