Climate of Bihar in the south China sea. The maximum frequency of the tropical cyclones in Bihar is during September–November especially during the asterism called hathiya. These cyclones are essential for the maturing of paddy, and are required for the moistening of the soil for the cultivation of rabi crops. Bihar is India's most flood-prone State, with 76% of the population in the north Bihar living under the recurring threat of flood devastation. According to some historical data, 16.5% of the total flood affected area in India is located in Bihar while 22.1% of the flood affected population in India lives in Bihar.
Provinces of Iran was reorganized to form ten numbered provinces with subordinate governorates: Gilan; Mazandaran; East Azerbaijan; West Azerbaijan; Kermanshah; Khuzestan; Fars; Kerman; Khorasan; Isfahan. From 1960 to 1981 the governorates were raised to provincial status one by one. Since then several new provinces have been created, most recently in 2010 when the new Alborz Province was split from Teheran province, and before that in 2004 when the province of Khorasan was divided into three provinces. Provinces of Iran Iran is subdivided into thirty-one provinces ( "Ostān", plural "Ostānhā"), each governed from a local center, usually the largest local city, which is called