Apparently the government of Iran has ordered the 1.5 million residents of the city of Isfahan to evacuate due to "pollution."

Or, could it have something to do with the proximity of the city to one of the government's facilities that processes yellowcake into nuclear bomb grade uranium?

If I was a resident of this town, I'd be out of there asap, and certain not to remain down wind of it for several hundred miles, at the least.  We will know more about this soon, no doubt.