These predictions assume that nobody will do anything, which is almost never true. The crisis is no less real just because a lot of resources was put into delaying its effects.

Back then they said Tehran will go out of water if there is no rain in coming weeks and it is raining in Tehran, now. Also they rationed water for a few weeks. Many regions of Tehran only had water during the night.

I read a similar prediction about Cape Town not long ago. It hasn't happened there despite the serious threat.

Perhaps this bit from the article is more concrete: "Tehran's five reservoirs plunged to 12 percent of capacity last month"

> two weeks, two months ago

I remember reading about droughts in Syria every year since ~2006. Somehow those news stopped after 5 years. Did they sort it out?

Elasticity of supply

Ever heard of clickbait?

It is unlikely Tehran will just evacuate all at once. They will do something drastic when the problem can no longer be ignored. And random events like rain will delay the inevitable for a while longer.

Perhaps this is how climate change will end up as well.

Right now, water is not available all day.