Provence-Alpes-Côte d'Azur Italian, Spanish, Portuguese and Maghrebi. This is the second-highest rate after Île-de-France (Greater Paris), where the figure was around 56%. Since the 1960s, the region has been a major immigration centre into France, mostly due to Mediterranean immigration from countries such as Portugal, Spain, Italy, Algeria, Tunisia and Morocco. Provence-Alpes-Côte d'Azur is divided into 6 departments. These are Alpes-de-Haute-Provence, Hautes-Alpes, Alpes-Maritimes, Bouches-du-Rhone, Var and Vaucluse. The largest cities in the region are Marseille (administrative capital city of the region), Nice, Toulon, and Aix-en-Provence, each with a population exceeding 100,000 inhabitants at the 1999 census. Along with Marseille, Nice is the
Alpes-de-Haute-Provence character, with a transition between the snow regime of the high valleys and the mediterranean rainfall regime in the lower mountains and below. The summer low water levels are severe and violent floods occur when heavy rains fall which is often in autumn. The Durance, Verdon, Bléone and Buëch have had the construction of several dams and the diversion of parts of the river for irrigation and power generation in the 20th century. The climate of the Alpes-de-Haute-Provence department is a Mediterranean climate degrading by altitude and latitude. In fact, while in the lower valleys and flat lands of Haute-Provence