The DH and I were talking about this last night. He is better with numbers than I am and I don't recall all the nitty-gritty of it but even if you were to light out the SECOND the sirens blew AND you had a straight shot inland on open road you would have 15 minutes, 20 at the most before the tsunami overtook you and your car going 80 mph ...That's inconcievable. Six minutes is barely enough time to get up to higher ground yourself. Imagine the scene at hospitals, day cares, old folks homes... what an awful situation. Even if you had a trailer ready to go and gas in the truck, chances are you'd have to hook up and by then the roads would be too congested to allow passage so you'd just basically watch your preps float away.