I do think about this from time to time. Given the layout of my house, if there is a fire, I won't be in a position to grab anything but the boys and my bathrobe. My house is built into a hillside, not near a fault line or flowing water and is over reinforced. I can't really think of any sort of weather that might cause us to evacuate, but if the nuclear power plant had a meltdown I'd be moving fast, even though I live outside the evacuation area. I would grab my laptop, all my photos, music & audio books are on it. I'd stuff the giant suitcase with whatever clothes I could grab for everyone, everyone's bed pillows and the boys loveys. Plus my purse.
The pillow may seem a strange choice but think about being in a strange place, with nothing of your own. Laying in a strange bed, after a traumatic event, stressed out about everything. But right there under your head is something that is familiar to all of your senses; it's sight, feel, smell, the sound your skin makes as you turn your head, even the taste of the fabric as you roll over brushing your lips on the fabric. Its comforting. It's 'home' even though home isnt there. Sort of a lovey for adults. I take my pillow with me when I travel, sacrificing clothing space to pack my pillow in the suitcase. I'm definately grabbing it if I have a chance.