Play around with NUKEMAP: http://nuclearsecrecy.com/nukemap/ http://nuclearsecrecy.com/nukemap/ If you are hit directly, you're fucked no matter what. But the

Play around with NUKEMAP: http://nuclearsecrecy.com/nukemap/ http://nuclearsecrecy.com/nukemap/ If you are hit directly, you're fucked no matter what. But the fireball has relatively small radius compared to the other zones. Ducking underneath something solid is to protect you if the building collapses, which is likely to occur in the large air-blast radius. This is much like ducking under a desk in an earthquake. Cover will save you if you're within the larger thermal radiation radius. Even clothing can be enough to protect you from burns, so any cover you can get is good.