Posted: Thu Mar 31, 2016 12:40 amPosted: Wed Mar 30, 2016 9:36 pmLoad another save.
Unless you have a window of opportunity to get out of the blast radius.
Posted: Wed Mar 30, 2016 7:59 pmPosted: Wed Mar 30, 2016 11:44 pm....Well, first you bring up the menu...
And then you go to Load, and there should be an option to load other saves you may have...
Posted: Thu Mar 31, 2016 2:01 amPosted: Wed Mar 30, 2016 3:32 pmwhat system are you playing on?
if PC the second you get into the game hit the console commands and toggle god mode till the blast is over,
if a console. sorry dude 
(i have had to no clip out of infinite falling on the side of a cliff on NV before)
Posted: Thu Mar 31, 2016 1:01 amPosted: Thu Mar 31, 2016 1:15 amPosted: Wed Mar 30, 2016 9:56 pmLast trick, if you get into that situation again.. Is to open your inventory and drug up. Jet, and anything you have to increase your damage resistance. Idea being that you can get some distance between you and certain death.