Already prone to droughts, Iran has exacerbated the problem with poor water management policies, which Mr. Pezeshkian acknowledged on Monday. Climate change, too, has played a role; the country has weathered five consecutive years of drought. Now, the crisis has grown so extreme that the government shut down all government offices and services in Tehran and more than two dozen other cities across the country on Wednesday, creating a three-day weekend in an attempt to lower water and electricity usage. Fatemeh Mohajerani, a government spokeswoman, said cities could have similar closures once or twice a week going forward, and suggested...