The great famine of 1870–71 was arguably the most tragic event in the modern economic and social history of Persia. Over wide areas of the country almost no rain fell during the winter of 1869/70, and in the following year only the western and southern provinces were blessed with any precipitation. Many areas did not have a single drop of rain during that two-year period. Khurāsān, Isfahān, Yazd and Fārs were particularly hard hit by the drought. In many areas dry-farming crops were wiped out, and harvests of irrigated crops were also very poor as a result of the severe depletion of surface and sub-surface water. Even the Zāyandeh-rūd, which normally contained a large volume of water, dried up.