If you didn't know already, there are just way too many Americans there. With all the dual citizenships, the "real" number I hear is in the tens of thousands.
I don't think the Embassy can get anything done in the near term based on the sheer numbers.
I'm not making excuses here, but the number of nationals probably exceeds all others in total.
If you know anyone in the mountains to the east, that's a better bet.
(Okay I realize that's not maybe welcome coming from stateside.)
Obviously, this is part of Hizbollah's strategy, using all of the foreigners in Lebanon as hostages.