Blame over the dust storms and heavy air pollution has mounted, with a prominent environmental expert telling local media that climate change, drought and government mismanagement of water resources are responsible for the increase in sandstorms.
Iran has drained its wetlands for farming -- a common practice known to produce dust in the region.
Alireza Shariat, the head of an association of Iranian water engineers, told Iran's semiofficial ILNA news agency last month that he expected extensive dust storms to become an "annual springtime phenomenon" in a way Iran has never seen before.