They're afraid of egyptian public, The public don't actually like iran, but they hate US-Israel hegomony. And if the government can't take an initiative because they're constrained by their abilities, the public act more on emotion and what they hope.Isn’t it interesting they are telling Americans to flee Egypt. What is going to happen in Egypt.
US oprations in the middle east makes the blood of a lot of people boil, even if it's not their country.
And of course, there's 5th column.
So you'll find them signal warning for a list of countries out of caution, not that there's an evidence of danger.
Of course, there's the possibility of something great is gonna happen, like Iraq invasion, but it's less likely for now.
Note: the list is not even ordered by danger, Egypt comes before Isael and UAE!