Since I'm in a city (and rather centrally located at that) I'm most likely dead, in great agony or at the very least absorbing a lethal radcount. Although it is a fairly stable brick building I'm in, and they'd probably aim for the docklands and industrial zone. I doubt a Hiroshima-sized charge could demolish my house at that distance, and there's far less danger of a gigantic firestorm like in a 1945 Japanese city with lots of paper and wood.
Hmm, I suppose I've substained some minor injuries, but I'm not too hurt to lock myself into my windowless bathroom, collect as much water as I can and await further instructions. Doubt the fallout will last too long with a Hiroshima-bomb, and the authorities aren't very far off. The worst I could get is if the house catches on fire.
EDIT: I saw the special rules, I survived and didn't get radified. Goodies, although most of the inner city is damaged or destroyed. The EMP have fried all my electronics, and I imagine the waterlines would be knocked out as well, not to mention the central heating. It's a mild winter, thankfully, and I've got an old fireplace and lots of stuff to burn in case of emergency. Providing the authorities supplies enough food rations and water, I think I'd make it.
If there is any volunteer-requests for cleanup or other activities, I'd sign up. I'd also very much like to know who nuked us and why, I do hope there will be newspapers available, the rest of the nation should be functional.
Double-edit: Using that very neat calculating program, I found that if a nuclear bomb the size of the Hiroshima bomb was targeted over the most likely target (the docklands and the main industrial zone), I wouldn't suffer much more than perhaps a few cracked windows and ruined electronics. Still would suck immensly, but at this time (3 in the morning) I doubt there would be many casualties.