Scattered around in nooks & crannies. That is a problem I have in my wifes car. My truck has most everything in a back pack.
We have tsunami evacuation signs along the coast highway. Some of the routes you can only drive up a little way and have to bail & run up hill. If you make it up the hill safely and all your survival gear was left down in your now submerged & destroyed vehicle you are screwed. There is also no food, water, shelter above you (steep Mt.) or below you.
There is no highway to go back to. You might have to hike along the beach for two to three days to get to an inland leading highway that is probably also blocked by landslides.
Recycle the kids’ old school backpacks to hold the car emergency kit. It’s easier to carry when you have to bail, keeps things together and doesn’t take up much space.