Would not be more efficient than run on the not so steep road to higher altitute just start climbing hillside? It didn't seem so difficult next to road and you can very quickly with the help of adrenaline climb many meters straight up instead of slowly winding road. I've found it odd they started to run on the road, if it would be me, I would take my daughter and together started to climb up as fast as possible.
Why run bus uphill instead of using bomb shelter which should be anyway airtight/sealed and after all, you need to protect yourself only from impact of tsunami, the water will very fast return back to the original location. Heck if you wanna risk it, why not lock yourself in toilet in middle of room in big ass concrete building until water pass through? Once again, you need to be protected only from impact, even if it will leak you can just swim to the top later and get out.
Is it realistic for fires after tsunami? Seem highly unlikely, pretty much only thing which could burn is fuel and I don't think it would burn at so many places as shown in movie. I know director had to light the scene, but why not just use moonlight?
What happened to the son under water when swimming out? He could not run out of oxygen after swimming 3 meters. Same for father donating oxygen, you still have some reserve, so he could swim those few meters through hallway. That didn't seem very realistic and they should skip this part completely.
Why are we shown 10 minutes timer and wave hitting it at same time when apparently these places were completel different locations, thus some of them must been hit at different time. PLus the geologist woman hit the button anyway quite late losing seconds, so it was actually more like 9 minutes since avalanche hit the water.
How do you think wll be going life of that kid knowing he is responsible for death of whole bus, the woman who tried to save him plus the death of man who tried to save him and his mother had to kill him? Was it really worth, so many people dying for one brat? Could not we have little bit of realism, bus running away with big fuck you, not waiting for some kid. I would much more preferred survivors in bus, mother and son dead in flooded hotel, though it would shorten movie and we would not have happy ending - whole family survive and it's not big deal they murdered one guy and killed whole hotel of tourists, what a happy ending.