We've spoken often in these pages of the need to prepare for emergencies. Nevertheless, sometimes the emergency arrives so quickly and unexpectedly, and is so devastating, that all the preparations in the world won't help.
Consider yesterday's earthquake and subsequent tsunami in Indonesia. Just look at these video clips. Both show a second tsunami arriving: you can see damage left by the first tsunami before the next one strikes.
Anyone whose emergency preparations were stored in one of the buildings hit by the tsunami, or who was relying for their getaway on a motor vehicle caught up in the flood . . . all their plans were suddenly derailed. Precisely the same thing might happen to anyone on the west coast of the USA, who gets caught up in an earthquake and tsunami on the Ring of Fire. It's by no means impossible.
Plan and prepare by all means, but consider all the possibilities. In a situation like that above, some supplies stored within relatively easy reach, perhaps with a friend living on higher ground, might make all the difference. Bicycles, stored where they're not easy prey for thieves, and are as safe as possible from that sort of damage, might also be a life-saver. The threat of earthquake and tsunami was and is foreseeable in that part of the world (as it is in California, Oregon and Washington states in the USA). Forethought can help you plan for the worst.
Options. It's good to have them.