Excuse me, but in the midst of falling rockets, planes aren’t going to be taking off, especially not if Tel Aviv is being targeted. Most people will be hiding in shelters anyway, not going anywhere.
You have to 1) have a reason to evacuate, and 2) actually have the time and ability to do so.
That presupposes that they will “know a war is coming, en mass”.
That’s presupposing a lot. That means the population will know ahead of time, which means that a preemptive strike would likely be used to STOP such an attack on civilians.
Also understand that Israel is a very SMALL place. A few hundred miles long and not more than about 1/10th as wide, they are surrounded by mostly hostile countries, and it’s their HOME.
If placed in the same situation, say surrounded by hostile states that can hit pretty much anywhere on your home territory, are you going to pack up lock, stock and barrel and leave your home, other family members and go somewhere that you might not be able to get back home to?
I personally wouldn’t. I’d stay and defend my home, and my state, and my family, I’m afraid would remain and stand next to me and do the same.
Honestly, there wouldn’t be much of an evacuation. Most men (and many women) between the ages of 16 and 50 over there have been in the military, and are on reserve status anyway. I’d think that the entire population would fight to maintain their existence.
While doing an evacuation for children might sound logical and a good thing (and I’m not knocking trying), I just don’t foresee such a thing occurring. It’s not as feasible as you make it sound, and historically speaking, I don’t recall they evacuated in any of the other wars they’ve experienced.
If I thought the Shahabs and Ashouras were about to fly, I’d leave.