Actually, I do know Oahu resident families who were at home and carried on doing what they were doing. One friend put on a movie her kids loved to watch, hugged them, and sat calmly in the living room. I've heard a lot of parents say that did/would do the same thing. Some entire families went outside to see what they could see. I've only lived two places in my life. Here and the DC area. People in Hawaii tend to have this sense of acceptance that is much deeper than I realized at first. Not all, of course, but way more than the DC area. I can see lots of residents ready to fight for survival, but I can see a lot simply being at peace with whatever happens - and that includes entire families with old people and kids.
In terms of putting gas in the car, we have to take into account that Hawaii is a small island chain in the middle of nowhere. It makes sense on the mainland, but as the kids in my neighborhood say, "Where you go?". We can only travel so far here. Even Oahu, with the largest population, has limited roads anyway. If a blast takes a part of the highway out, everyone is trapped in the city.