I don't think it's going to happen but if it did I would just sit in my tornado shelter / fallout shelter which can be used for either disaster until it's safe to come out. I have enough canned canned food and bottled water down there to last a long time.
I'm going to absorb the radiation and let it be a catalyst to trigger mutations within me causing me to become a super-hero. A super-gay super-hero. All I need is a really colorful pair of tights, a cape, and some rockin' boots. Holy Sh!t, Batman. I'm gonna be so awesome.