At the start of this week an area of low pressure moved off the coast of north Africa, deepening as it travelled northwards across the Mediterranean before situating itself over Italy. Consequentially, much of the country received persistent heavy rain from Monday to Wednesday with the largest quantity falling over the north-eastern Emilia-Romagna region.
Within a 36-hour period this region received an average 200mm of rainfall, although some areas recorded at least 500mm during the same period. Given Emilia-Romagna receives an average of 1,000mm a year, 50% of the annual mean rainfall falling in a short timeframe in a localised area has led to substantial flooding as rivers burst their banks.
