"Hit the desalinization plant at the Saudi side of the Bahrain Causeway, & Riyadh would have to be completely evacuated in under 14 days!"

[Stein's-SpyTalk] "... "I would say that if Iranian missiles hit the desalinization plant at the Saudi side of the Bahrain Causeway, Riyadh would have to be completely evacuated in under 14 days," added Gwenyth Tddd, a former Fifth Fleet political advisor and White House national security official. "The Saudis have a huge aquifer, but they have severely depleted it over the past three decades because of their dream to export home grown wheat, etc.--an insane policy."
"Dubai cannot function without desal," Todd added by e-mail.  "All those hotels, water features, ski slopes-just imagine.
"And Bahrain, which means 'Two Seas' in Arabic, has also screwed itself on the fresh water front. Bahrain's geology involves a limestone barrier that allowed the center of the island to create a wonderful fresh water aquifer, surrounded by the Gulf, hence the Two Seas.  But then came the Khalifas" -- Bahrain's royal family--"and the dream of a super-luxury skyline."
They've toyed with Bahrain's geological foundation, Todd said, creating new, grave vulnerabilities.

"... Four decades ago, there were fresh water lakes and swimming holes all around. But in building all these big towers, they punched holes in the limestone barrier, not only causing the loss of a lot of fresh water, but also letting in the salt water, creating a problem with brackish water.  Farmers are screwed and the various 'Ayns' are mostly dry.  Meanwhile, the Khalifas have been madly filling in the Gulf to expand their land mass area, so the traditional fishermen are also screwed...." 

Iran is not so vulnerable--at least on that front..."