Always remember kids:
Training in any martial arts, e.g. Karate, Teakwando, Judo, Boxing, aso, will steel your body and make you at some point invulnerable to elemental attacks. Technically you should be able to withstand the heat and radiation of a nuclear explosion close by (down to 1m(3.28ft) away or so. But be careful! Being closer might get dangerous though!) This isn't taking the shockwave into account, which might still hurt you, but you should be able to counter it with your techniques. It doubles as extra training and is fun.
BTW, I like how the author throw in a killer gardener. Just for the heck of it.