Iran is undergoing its worst drought in decades, with Tehran recording only 1mm of rainfall this year compared to the 350mm average.The Amir-Kabir Dam's reservoir is critically low at about 10% capacity amid an 89% decrease in rainfall nationwide.Iranian authorities have begun cloud-seeding operations over the Urmia Lake basin, while President Massoud Pezeshkian warned of possible evacuations if rain does not increase soon.