As far as natural emergencies in my own area, we have to stay on our toes for twisters, esp. since the F3 ripped thru downtown back in '98, proving that major cities donot protect one from tornadoes...it passed about a mile north of my workplace, I saw it as I was driving in...when I pulled in the parking lot, my co-workers were all standing outside to get a look...
Our prep involves dragging the family (inc. the dog) down to the basement & turning on tv or radio to monitor...if a twister does come, we would get under the porch crawl space (12" of concrete overhead should provide a safe haven)

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