No I don't ... at least not one I carry with me routinely. I have an iPhone but depending on the emergency I could see that not working.

I've been meaning to plan & put together a dedicated, small urban kit instead of just tossing my hiking stuff into my urban bag. This might be a good time to look at that more closely (plus, my hiking stuff hasn't made it back into my urban bag from my last trip!). It would definitely make sense to include a radio ... I wonder if something like this would be worthwhile: Etón FRX1